从文件路径显示图像视图？

Question

我需要仅使用文件名来显示图像，而不是使用资源ID。

ImageView imgView = new ImageView(this);
imgView.setBackgroundResource(R.drawable.img1);

我在drawable文件夹中有图像img1。我希望从文件中显示该图像。

我该怎么做？

Answer 1

如果您的资源已经放置在资源文件夹中，Labeeb对于您需要使用路径设置图像的原因是正确的

仅当您的图像存储在SD卡中时才需要此类路径。

并且尝试使用以下代码从存储在SD卡中的文件中设置位图图像。

File imgFile = new  File("/sdcard/Images/test_image.jpg");

if(imgFile.exists()){

    Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());

    ImageView myImage = (ImageView) findViewById(R.id.imageviewTest);

    myImage.setImageBitmap(myBitmap);

}

并在清单文件中包含此权限：

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Answer 2

我认为你可以使用这个

Bitmap bmImg = BitmapFactory.decodeFile("path of your img1");
imageView.setImageBitmap(bmImg);

Answer 3

您也可以使用：

    File imgFile = new  File(“filepath”);
    if(imgFile.exists())
    {
        ImageView myImage = new ImageView(this);
        myImage.setImageURI(Uri.fromFile(imgFile));

    }

这是隐含的位图解码。

Answer 4

String path = Environment.getExternalStorageDirectory()+ "/Images/test.jpg";

File imgFile = new File(path);
if(imgFile.exists())
{
   Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
   ImageView imageView=(ImageView)findViewById(R.id.imageView);
  imageView.setImageBitmap(myBitmap);
}

Answer 5

所有答案都已过时。最好将picasso用于此类目的。它有很多功能，包括背景图像处理。

我提到它非常容易使用：

Picasso.with(context).load(new File(...)).into(imageView);

Answer 6

来自官方网站：http://developer.android.com/training/displaying-bitmaps/load-bitmap.html

ImageView image = (ImageView) findViewById(R.id.imagePreview);           
try {
    image.setImageBitmap(decodeSampledBitmap(picFilename));
} catch (Exception e) {
    e.printStackTrace();
}

这里的方法：

    private int calculateInSampleSize(
            BitmapFactory.Options options, int reqWidth, int reqHeight) {
        // Raw height and width of image
        final int height = options.outHeight;
        final int width = options.outWidth;
        int inSampleSize = 1;

        if (height > reqHeight || width > reqWidth) {

            final int halfHeight = height / 2;
            final int halfWidth = width / 2;

            // Calculate the largest inSampleSize value that is a power of 2 and keeps both
            // height and width larger than the requested height and width.
            while ((halfHeight / inSampleSize) > reqHeight
                    && (halfWidth / inSampleSize) > reqWidth) {
                inSampleSize *= 2;
            }
        }

        return inSampleSize;
    }

    private Bitmap decodeSampledBitmap(String pathName,
            int reqWidth, int reqHeight) {

        // First decode with inJustDecodeBounds=true to check dimensions
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(pathName, options);

        // Calculate inSampleSize
        options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);

        // Decode bitmap with inSampleSize set
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeFile(pathName, options);
    }

//I added this to have a good approximation of the screen size: 
    private Bitmap decodeSampledBitmap(String pathName) {
        Display display = getWindowManager().getDefaultDisplay();
        Point size = new Point();
        display.getSize(size);
        int width = size.x;
        int height = size.y;
        return decodeSampledBitmap(pathName, width, height);
    }   

Answer 7

您可以使用：

ImageView imgView = new ImageView(this);
InputStream is = getClass().getResourceAsStream("/drawable/" + fileName);
imgView.setImageDrawable(Drawable.createFromStream(is, ""));

Answer 8

您可以使用它来访问特定文件夹并获取特定图像

 public void Retrieve(String path, String Name)
   {
    File imageFile = new File(path+Name);

    if(imageFile.exists()){

        Bitmap myBitmap = BitmapFactory.decodeFile(path+Name);
        myImage = (ImageView) findViewById(R.id.savedImage);
        myImage.setImageBitmap(myBitmap);
        Toast.makeText(SaveImage.this, myBitmap.toString(), Toast.LENGTH_LONG).show();

    }
}

然后你可以通过

来调用它

Retrieve(Environment.getExternalStorageDirectory().toString()+"/Aqeel/Images/","Image2.PNG");
Toast.makeText(SaveImage.this, "Saved", Toast.LENGTH_LONG).show();

Answer 9

       public static Bitmap decodeFile(String path) {
    Bitmap b = null;
    File f = new File(path);
    // Decode image size
    BitmapFactory.Options o = new BitmapFactory.Options();
    o.inJustDecodeBounds = true;

    FileInputStream fis = null;
    try {
        fis = new FileInputStream(f);
        BitmapFactory.decodeStream(fis, null, o);
        fis.close();

        int IMAGE_MAX_SIZE = 1024; // maximum dimension limit
        int scale = 1;
        if (o.outHeight > IMAGE_MAX_SIZE || o.outWidth > IMAGE_MAX_SIZE) {
            scale = (int) Math.pow(2, (int) Math.round(Math.log(IMAGE_MAX_SIZE / (double) Math.max(o.outHeight, o.outWidth)) / Math.log(0.5)));
        }

        // Decode with inSampleSize
        BitmapFactory.Options o2 = new BitmapFactory.Options();
        o2.inSampleSize = scale;

        fis = new FileInputStream(f);
        b = BitmapFactory.decodeStream(fis, null, o2);
        fis.close();

    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    return b;
}

public static Bitmap showBitmapFromFile(String file_path)
{
    try {
        File imgFile = new  File(file_path);
        if(imgFile.exists()){

            Bitmap pic_Bitmap = decodeFile(file_path);
            return pic_Bitmap;

        }
    } catch (Exception e) {
        MyLog.e("Exception showBitmapFromFile");
        return null;
    }
    return null;
}   

如果您在列表视图中使用图像加载，则使用Aquery概念。

https://github.com/AshishPsaini/AqueryExample

     AQuery  aq= new AQuery((Activity) activity, convertView);
            //load image from file, down sample to target width of 250 pixels .gi 
    File file=new File("//pic/path/here/aaaa.jpg");
    if(aq!=null)
    aq.id(holder.pic_imageview).image(file, 250);

Answer 10

如何在Android

中显示来自文件夹路径的图像

非常第一：确保您已将权限添加到Mainfest文件中：

 <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

##：制作一个MyGallery课程

公共类MyGallery扩展了活动{

private GridView gridView;
private String _location;

private String newFolder = "/IslamicGif/";
private String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
private AdView mAdView;
private ArrayList<Bitmap> photo = new ArrayList<Bitmap>();
public static String[] imageFileList;
TextView gallerytxt;

public static ImageAdapter imageAdapter;

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.mygallery);
    /*if (MenuClass.mInterstitialAd.isLoaded()) {
        MenuClass.mInterstitialAd.show();
    }*/

    gallerytxt = (TextView) findViewById(R.id.gallerytxt);
    /*gallerytxt.setTextSize(20);
    int[] color = {Color.YELLOW,Color.WHITE};
    float[] position = {0, 1};
    Shader.TileMode tile_mode0= Shader.TileMode.REPEAT; // or TileMode.REPEAT;
    LinearGradient lin_grad0 = new LinearGradient(0, 0, 0, 200,color,position, tile_mode0);
    Shader shader_gradient0 = lin_grad0;
    gallerytxt.getPaint().setShader(shader_gradient0);*/
    ImageButton btn_back = (ImageButton) findViewById(R.id.btn_back);
    btn_back.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            MyGallery.this.finish();
        }
    });


    mAdView = (AdView) findViewById(R.id.adView);
    AdRequest adRequest = new AdRequest.Builder()
            .build();
    mAdView.loadAd(adRequest);
    gridView = (GridView) findViewById(R.id.gridView);

    new MyGalleryAsy().execute();

    gridView.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int pos, long arg3) {
            // TODO Auto-generated method stub
            Intent intent = new Intent(MyGallery.this, ImageDetail.class);
            intent.putExtra("ImgUrl", imageFileList[pos]);

            //Toast.makeText(MyGallery.this,"image detail"+pos,Toast.LENGTH_LONG).show();
            startActivity(intent);
        }
    });


}

protected void onStart() {
    super.onStart();
    if (ImageDetail.deleted) {
        photo = new ArrayList<Bitmap>();
        new MyGalleryAsy().execute();
        ImageDetail.deleted = false;
    }

}

public class MyGalleryAsy extends AsyncTask<Void, Void, Void> {
    private ProgressDialog dialog;
    Bitmap mBitmap;

    @Override
    protected void onPreExecute() {
        dialog = ProgressDialog.show(MyGallery.this, "", "Loading ...", true);
        dialog.show();
    }

    @Override
    protected Void doInBackground(Void... arg0) {

        readImage();
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {

        dialog.dismiss();
        DisplayMetrics displayMatrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(displayMatrics);
        int screenWidth = displayMatrics.widthPixels / 3;

        if (photo.size() > 0) {
            imageAdapter = new ImageAdapter(MyGallery.this, screenWidth);
            gridView.setAdapter(imageAdapter);
        }

    }

}


private void readImage() {
    // TODO Auto-generated method stub


    try {
        if (isSdPresent()) {
            _location = extStorageDirectory + newFolder;
        } else
            _location = getFilesDir() + newFolder;
        File file1 = new File(_location);

        if (file1.isDirectory()) { // sdCard == true
            imageFileList = file1.list();
            if (imageFileList != null) {
                for (int i = 0; i < imageFileList.length; i++) {
                    try {
                        photo.add(BitmapFactory.decodeFile(_location + imageFileList[i].trim()));
                    } catch (Exception e) {
                        // TODO: handle exception
                        //Toast.makeText(getApplicationContext(), e.toString(),Toast.LENGTH_LONG).show();
                    }
                }
            }
        }
    } catch (Exception e) {
        // TODO: handle exception
    }
}

public static boolean isSdPresent() {
    return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
}

public class ImageAdapter extends BaseAdapter {

    private Context context;
    private LayoutInflater layoutInflater;
    private int width;
    private int mGalleryItemBackground;

    public ImageAdapter(Context c) {
        context = c;

    }

    public ImageAdapter(Context c, int width) {
        context = c;
        this.width = width;
    }

    public int getCount() {
        return photo.size();
    }

    public Object getItem(int position) {
        return null;
    }

    public long getItemId(int position) {
        return 0;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        View v = convertView;
        layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = layoutInflater.inflate(R.layout.galleryadapter, null);

        RelativeLayout layout = (RelativeLayout) v.findViewById(R.id.galleryLayout);

        ImageView imageView = new ImageView(context);
        layout.addView(imageView, new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, width));
        imageView.setScaleType(ImageView.ScaleType.FIT_XY);
        layout.setLayoutParams(new GridView.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, width));
        imageView.setImageBitmap(photo.get(position));

        return v;

    }

    public void updateItemList(ArrayList<Bitmap> newItemList) {
        photo = newItemList;
        notifyDataSetChanged();
    }
}

}

现在创建其Xml类

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/bg"
android:orientation="vertical">

<RelativeLayout
    android:id="@+id/relativeLayout"
    android:layout_width="match_parent"
    android:layout_height="56dp"
    android:background="@color/colorPrimary"
    android:minHeight="?attr/actionBarSize">

    <TextView
        android:id="@+id/gallerytxt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:layout_gravity="center"
        android:fontFamily="@string/font_fontFamily_medium"
        android:text="My Gallery"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:textColor="@android:color/black"
        android:textStyle="bold" />

    <ImageButton
        android:id="@+id/btn_back"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_centerVertical="true"
        android:layout_marginLeft="12dp"
        android:background="@drawable/ic_arrow_back_black_24dp" />
</RelativeLayout>


<com.google.android.gms.ads.AdView
    android:id="@+id/adView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_gravity="center|bottom"
    android:visibility="gone"
    ads:adSize="BANNER"
    ads:adUnitId="@string/banner_id" />

<GridView
    android:id="@+id/gridView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_above="@+id/adView"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_below="@+id/relativeLayout"
    android:horizontalSpacing="5dp"
    android:numColumns="2"
    android:smoothScrollbar="true"
    android:verticalSpacing="5dp"></GridView>

同时制作适配器galleryadapter.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:id="@+id/galleryLayout"
android:padding="2dp">

要查看详细图像，请创建一个新的类ImageDetail：

public class ImageDetail extends Activity implements OnClickListener {
public static InterstitialAd mInterstitialAd;
private ImageView mainImageView;
private LinearLayout menuTop;
private TableLayout menuBottom;
private Boolean onOff = true;
private ImageView delButton, mailButton, shareButton;

private String imgUrl = null;
private AdView mAdView;
TextView titletxt;
private String newFolder = "/IslamicGif/";
private String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
public static boolean deleted = false;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.image_detail);

    mAdView = (AdView) findViewById(R.id.adView);
    AdRequest adRequest = new AdRequest.Builder()
            .build();
    mAdView.loadAd(adRequest);
    mAdView.setAdListener(new AdListener() {
        @Override
        public void onAdLoaded() {
            mAdView.setVisibility(View.VISIBLE);
        }
    });
    mainImageView = (ImageView) findViewById(R.id.mainImageView);
    menuTop = (LinearLayout) findViewById(R.id.menuTop);
    menuBottom = (TableLayout) findViewById(R.id.menuBottom);
    titletxt = (TextView) findViewById(R.id.titletxt);
    titletxt.setTextSize(22);
    mInterstitialAd = new InterstitialAd(this);
    mInterstitialAd.setAdUnitId(getString(R.string.interstial_id));

    mInterstitialAd.setAdListener(new AdListener() {
        @Override
        public void onAdClosed() {
            requestNewInterstitial();

        }
    });
    requestNewInterstitial();
    delButton = (ImageView) findViewById(R.id.delButton);
    mailButton = (ImageView) findViewById(R.id.mailButton);
    shareButton = (ImageView) findViewById(R.id.shareButton);

    Bundle exBundle = getIntent().getExtras();
    if (exBundle != null) {
        imgUrl = exBundle.getString("ImgUrl");
    }
    if (isSdPresent()) {
        imgUrl = extStorageDirectory + newFolder + imgUrl;
    } else
        imgUrl = getFilesDir() + newFolder + imgUrl;

    if (imgUrl != null) {
        GlideDrawableImageViewTarget imageViewTarget = new GlideDrawableImageViewTarget(mainImageView);
        Glide.with(this).load(imgUrl).into(imageViewTarget);

    }


    delButton.setOnClickListener(this);
    mailButton.setOnClickListener(this);
    shareButton.setOnClickListener(this);


}

public static boolean isSdPresent() {
    return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
}


@Override
public void onClick(View arg0) {
    // TODO Auto-generated method stub
    switch (arg0.getId()) {
        case R.id.shareButton:
            Image_Link();
            break;
        case R.id.delButton:
            deleted();
            break;
        case R.id.mailButton:
            sendemail();
            break;
        default:
            break;
    }
}

private void sendemail() {

    try {

        File photo = new File(imgUrl);
        Uri imageuri = Uri.fromFile(photo);


        String url = Constant.AppUrl;

        SpannableStringBuilder builder = new SpannableStringBuilder();
        builder.append("Face Placer App Available here..Play Link");
        int start = builder.length();
        builder.append(url);
        int end = builder.length();

        builder.setSpan(new URLSpan(url), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

        Intent emailIntent2 = new Intent(Intent.ACTION_SEND);
        String[] recipients2 = new String[]{"mymail@email.com", "",};
        emailIntent2.putExtra(Intent.EXTRA_EMAIL, recipients2);
        emailIntent2.putExtra(Intent.EXTRA_SUBJECT, "Sample mail");
        emailIntent2.putExtra(Intent.EXTRA_STREAM, imageuri);
        emailIntent2.putExtra(Intent.EXTRA_TEXT, builder);
        emailIntent2.setType("text/html");
        emailIntent2.setType("image/JPEG");
        startActivity(Intent.createChooser(emailIntent2, "Send mail client :"));

    } catch (Exception e) {
        // TODO: handle exception

        Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show();
    }
}


private void Image_Link() {

    try {

        File photo = new File(imgUrl);
        Uri imageuri = Uri.fromFile(photo);


        String url = Constant.AppUrl;

        SpannableStringBuilder builder = new SpannableStringBuilder();
        builder.append("Face Placer App Available here..Play Link");
        int start = builder.length();
        builder.append(url);
        int end = builder.length();

        builder.setSpan(new URLSpan(url), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

        Intent emailIntent2 = new Intent(Intent.ACTION_SEND);
        String[] recipients2 = new String[]{"mymail@email.com", "",};
        emailIntent2.putExtra(Intent.EXTRA_EMAIL, recipients2);
        emailIntent2.putExtra(Intent.EXTRA_SUBJECT, "Sample mail");
        emailIntent2.putExtra(Intent.EXTRA_STREAM, imageuri);
        emailIntent2.putExtra(Intent.EXTRA_TEXT, builder);
        emailIntent2.setType("text/html");
        emailIntent2.putExtra(Intent.EXTRA_TEXT, "Face Placer App Available here..Play Link " + url);
        emailIntent2.setType("image/JPEG");
        startActivity(Intent.createChooser(emailIntent2, "Send mail client :"));

    } catch (Exception e) {
        // TODO: handle exception

        Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show();
    }
}


private void deleted() {
    if (mInterstitialAd.isLoaded()) {
        mInterstitialAd.show();
    }

    AlertDialog.Builder builder = new AlertDialog.Builder(ImageDetail.this);
    builder.setTitle(getString(R.string.removeoption));
    builder.setMessage(getString(R.string.deleteimage));
    builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id) {
            // User clicked OK button
            dialog.cancel();
            File fileDel = new File(imgUrl);
            boolean isCheck1 = fileDel.delete();

            if (isCheck1) {
                deleted = true;
                finish();
                MyGallery.imageAdapter.notifyDataSetChanged();

            } else {
                Toast.makeText(getApplicationContext(), "error", Toast.LENGTH_LONG).show();
            }
        }
    });

    builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id) {
            // User clicked OK button
            dialog.cancel();

        }
    });
    Dialog dialog = builder.create();
    dialog.show();


}


private boolean isNetworkConnected() {
    ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo ni = cm.getActiveNetworkInfo();
    if (ni == null) {
        // There are no active networks.
        return false;
    } else
        return true;
}

private void requestNewInterstitial() {
    AdRequest adRequest = new AdRequest.Builder()
            .addTestDevice("SEE_YOUR_LOGCAT_TO_GET_YOUR_DEVICE_ID")
            .build();

    mInterstitialAd.loadAd(adRequest);
}

}

创建其xml image_detail.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/bg"
android:orientation="vertical">

<ImageView
    android:id="@+id/mainImageView"
    android:layout_width="match_parent"
    android:layout_height="fill_parent"
    android:layout_alignParentBottom="true"
    android:contentDescription="@string/app_name"
    android:focusable="true"
    android:focusableInTouchMode="true" />

<LinearLayout
    android:id="@+id/adlayout"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:orientation="horizontal"
    android:visibility="gone"></LinearLayout>

<LinearLayout
    android:id="@+id/menuTop"
    android:layout_width="fill_parent"
    android:layout_height="56dp"
    android:layout_alignWithParentIfMissing="true"
    android:layout_below="@+id/adlayout"
    android:background="@color/colorPrimary"
    android:orientation="vertical"
    android:padding="10.0dip"
    android:visibility="visible">

    <TextView
        android:id="@+id/titletxt"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:text="Islamic Gifs"
        android:textColor="#000000"
        android:textSize="22sp"
        android:textStyle="bold" />
</LinearLayout>

<TableLayout
    android:id="@+id/menuBottom"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:background="@color/colorPrimary"
    android:padding="10.0dip"
    android:stretchColumns="*"
    android:visibility="visible">

    <TableRow>

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:gravity="center_horizontal">

            <ImageView
                android:id="@+id/mailButton"
                android:layout_width="52dp"
                android:layout_height="52dp"
                android:background="@drawable/selector_shareimage"
                android:contentDescription="@string/app_name" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:gravity="center_horizontal">

            <ImageView
                android:id="@+id/shareButton"
                android:layout_width="52dp"
                android:layout_height="52dp"
                android:background="@drawable/selector_shareimage_small"
                android:contentDescription="@string/app_name" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:gravity="center_horizontal">

            <ImageView
                android:id="@+id/delButton"
                android:layout_width="52dp"
                android:layout_height="52dp"
                android:background="@drawable/selector_delete"
                android:contentDescription="@string/app_name" />
        </LinearLayout>
    </TableRow>
</TableLayout>

<com.google.android.gms.ads.AdView
    android:id="@+id/adView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/menuTop"
    android:layout_centerHorizontal="true"
    android:visibility="gone"
    ads:adSize="BANNER"
    ads:adUnitId="@string/banner_id"></com.google.android.gms.ads.AdView>

将您自己的Drawable添加到Selector类，并创建它res＆gt; drawable＆gt; selector_shareimage.xml

<?xml version="1.0" encoding="utf-8"?>

<item android:drawable="@drawable/result_bt_mail" android:state_enabled="true" android:state_pressed="true"/>
<item android:drawable="@drawable/result_bt_mail" android:state_enabled="true" android:state_focused="true"/>
<item android:drawable="@drawable/result_bt_mail" android:state_enabled="true" android:state_selected="true"/>
<item android:drawable="@drawable/result_bt_mail_s"/>

Answer 11

onLoadImage满载

 class Aboutus_model extends CI_Model 
    {
        public function about_us_page()
        { 

     $data = $this->db->query('select * from ins_aboutus');
        return $data->result();

    }

}

// else {

  private void onLoadImage(final String imagePath) {
    ImageSize targetSize = new ImageSize(imageView.getWidth(), imageView.getHeight()); // result Bitmap will be fit to this size

    //ImageLoader imageLoader = ImageLoader.getInstance(); // Get singleto
    com.nostra13.universalimageloader.core.ImageLoader imageLoader = com.nostra13.universalimageloader.core.ImageLoader.getInstance();
    imageLoader.init(ImageLoaderConfiguration.createDefault(getContext()));


    imageLoader.loadImage(imagePath, targetSize, new SimpleImageLoadingListener() {
        @Override
        public void onLoadingStarted(final String imageUri, View view) {
            super.onLoadingStarted(imageUri, view);

            progress2.setVisibility(View.VISIBLE);


           new Handler().post(new Runnable() {
               public void run() {

                    progress2.setColorSchemeResources(android.R.color.holo_green_light, android.R.color.holo_orange_light, android.R.color.holo_red_light);


                  //  Picasso.with(getContext()).load(imagePath).into(imageView);
                     // Picasso.with(getContext()).load(imagePath) .memoryPolicy(MemoryPolicy.NO_CACHE, MemoryPolicy.NO_STORE).into(imageView);

                    Glide.with(getContext())
                            .load(imagePath)
                            .asBitmap()
                          .into(imageView);

                }
          });

        }



        @Override
        public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
            if(view == null){
                progress2.setVisibility(View.INVISIBLE);

            }

Answer 12

private void showImage(ImageView img, String absolutePath) {
  
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inSampleSize = 8;
    Bitmap bitmapPicture = BitmapFactory.decodeFile(absolutePath);
    img.setImageBitmap(bitmapPicture);

}

Answer 13

大多数答案都有效，但没有人提到高分辨率图像会减慢应用程序的速度，就我而言，我使用了图像 RecyclerView，它仅在 30 个图像中就占用了 0.9 GB 的设备内存。

<块引用>

我/编舞：跳过了 73 帧！应用程序可能也在做 在其主线程上做了很多工作。

解决方案是 Sipmle，您可以像这里一样降低质量：Reduce resolution of Bitmap

但我使用简单的方式，Glide 处理其余的工作

fanContext?.let {
            Glide.with(it)
                .load(Uri.fromFile(File(item.filePath)))
                .into(viewHolder.imagePreview)
        }

Answer 14

mageView.setImageResource(R.id.img);