Question

从图库中选择图片时，uri为：/ storage / emulated / 0 /图片/ 图片：49769

我需要：/storage/emulated/0/Pictures/image.jpg

如何获取图像的实际名称？

我现在有这个：

if(requestCode==REQ_CODE_PICTURE && resultCode==RESULT_OK && data != null &&    data.getData() != null) {

fileUri = data.getData();
imageView.setImageURI(fileUri);

Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);

File f = new   File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getAbsolutePath() + "/" + fileUri.getPathSegments().get(fileUri.getPathSegments().size()-1));

Uri contentUri = Uri.parse(f.getAbsolutePath());
//uriToUpload = contentUri.toString();
uriToUpload = getRealPathFromURI(contentUri);
Log.i("AAAAAAA", uriToUpload);



public String getRealPathFromURI(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
@SuppressWarnings("deprecation")
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index =   cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}

这是cursor.moveToFirst（）中的错误：

12-19 11：39：16.469 5096-5096 / com.example.formador.a42_camera E / AndroidRuntime：FATAL EXCEPTION：main 处理：com.example.formador.a42_camera，PID：5096 java.lang.RuntimeException：传递结果失败ResultInfo {who = null，request = 234，result = -1，data = Intent {dat = content：//com.android.providers.media.documents/document/image：49769 flg = {0x1}} to activity {com.example.formador.a42_camera / com.example.formador.a42_camera.MainActivity}：java.lang.NullPointerException：尝试调用接口方法'int android.database.Cursor.getColumnIndexOrThrow（java.lang .string）'在空对象引用上在android.app.ActivityThread.deliverResults（ActivityThread.java:3798）在android.app.ActivityThread.handleSendResult（ActivityThread.java:3841）在android.app.ActivityThread.access $ 1400（ActivityThread.java:154）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1440）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:234）在android.app.ActivityThread.main（ActivityThread.java:5526） at java.lang.reflect.Method.invoke（Native Method）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:726）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:616）引起：java.lang.NullPointerException：尝试在空对象引用上调用接口方法'int android.database.Cursor.getColumnIndexOrThrow（java.lang.String）' 在com.example.formador.a42_camera.MainActivity.getRealPathFromURI（MainActivity.java:163） at com.example.formador.a42_camera.MainActivity.onActivityResult（MainActivity.java:147）在android.app.Activity.dispatchActivityResult（Activity.java:6490）在android.app.ActivityThread.deliverResults（ActivityThread.java:3794）在android.app.ActivityThread.handleSendResult（ActivityThread.java:3841）在android.app.ActivityThread.access $ 1400（ActivityThread.java:154）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1440）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:234）在android.app.ActivityThread.main（ActivityThread.java:5526） at java.lang.reflect.Method.invoke（Native Method）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:726）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:616）

Answer 1

从你的uri获取真正的路径

public String getRealPathFromURI(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
@SuppressWarnings("deprecation")
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor
        .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}

Answer 2

activity_main.xml：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.pickiimagefromgallery_android_examples.com.MainActivity" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
         />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:text="Select Image" />

</RelativeLayout>

MainActivity.java：

public class MainActivity extends Activity {

    private static int IMG_RESULT = 1;
    String ImageDecode;
    ImageView imageViewLoad;
    Button LoadImage;
    Intent intent;
    String[] FILE;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        imageViewLoad = (ImageView) findViewById(R.id.imageView1);
        LoadImage = (Button) findViewById(R.id.button1);

        LoadImage.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                intent = new Intent(Intent.ACTION_PICK,
                        android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

                startActivityForResult(intent, IMG_RESULT);

            }
        });

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        try {
            if (requestCode == IMG_RESULT && resultCode == RESULT_OK
                    && null != data) {
                Uri URI = data.getData();
                String[] FILE = {MediaStore.Images.Media.DATA};
                Cursor cursor = getContentResolver().query(URI,
                        FILE, null, null, null);
                cursor.moveToFirst();
                int columnIndex = cursor.getColumnIndex(FILE[0]);
                ImageDecode = cursor.getString(columnIndex);
                cursor.close();
                Log.i("ImageDecode", "+++" + ImageDecode);
                imageViewLoad.setImageBitmap(BitmapFactory
                        .decodeFile(ImageDecode));
            }
        } catch (Exception e) {
            Toast.makeText(this, "Please try again", Toast.LENGTH_LONG)
                    .show();
        }

    }
}

<强>的Manifest.xml：

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

我从图库

2 个答案: