我想以网格格式显示多个图像，每行2个图像。如何使用Android Query执行此操作？现有的例子不足，缺乏适当的文件......
activity_identify_animals.xml：
<ProgressBar
android:layout_width="15dip"
android:layout_height="15dip"
android:id="@+id/progress"
android:layout_centerInParent="true"
/>
<ImageView
android:id="@+id/image"
android:layout_width="fill_parent"
android:layout_height="75dip"
/>
IdentifyAnimals.java：
package uk.ac.gla.serengeti.activities;
import com.androidquery.AQuery;
import uk.ac.gla.serengeti.R;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.MenuItem;
import android.annotation.TargetApi;
import android.os.Build;
public class IdentifyAnimals extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_identify_animals);
AQuery aq = new AQuery(this);
aq.id(R.id.image).progress(R.id.progress).image("http://www.ibeta.eu/blog/wp-content/uploads/2012/02/darthvader-design.jpg");
aq.id(R.id.image).progress(R.id.progress).image("http://www.geekome.com/wp-content/uploads/2013/09/anakin-skywalker-voice-as-darth-vader.jpeg");
aq.id(R.id.image).progress(R.id.progress).image("http://www.camelcitydispatch.com/wp-content/uploads/2013/01/Darth-Vader-liking-villans-more-than-heroes-31394364-1280-960.jpg");
aq.id(R.id.image).progress(R.id.progress).image("http://www.geekbinge.com/wp-content/uploads/2013/08/Darth-Vader-Star-Wars.jpg");
aq.id(R.id.image).progress(R.id.progress).image("http://static1.wikia.nocookie.net/__cb20111223224559/starwars/images/b/b0/DarthVader-CotF.jpg");
aq.id(R.id.image).progress(R.id.progress).image("http://www.wallsave.com/wallpapers/1920x1200/darth-vader/460382/darth-vader-hd-free-for-460382.jpg");
}
/**
* Set up the {@link android.app.ActionBar}, if the API is available.
*/
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
private void setupActionBar() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
getActionBar().setDisplayHomeAsUpEnabled(true);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.identify_animals, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// This ID represents the Home or Up button. In the case of this
// activity, the Up button is shown. Use NavUtils to allow users
// to navigate up one level in the application structure. For
// more details, see the Navigation pattern on Android Design:
//
// http://developer.android.com/design/patterns/navigation.html#up-vs-back
//
//NavUtils.navigateUpFromSameTask(this);
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
}
答案 0 :(得分：4)
您可以使用包含2列的网格视图
<GridView
android:id="@+id/gridviewimg"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:gravity="center"
android:numColumns="2"
android:scrollbarStyle="outsideInset"
android:smoothScrollbar="true"
android:verticalSpacing="10dp"
android:paddingBottom="50dp"
android:paddingTop="10dp" />
修改 当然。您可以编写自己的适配器类并填写数组
public class ImageListAdapter extends BaseAdapter {
private Context context;
private List<String> imgPic;
public ImageListAdapter(Context c, List<String> thePic) {
context = c;
imgPic = thePic;
}
public int getCount() {
if(imgPic != null)
return imgPic.size();
else
return 0;
}
//---returns the ID of an item---
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
//---returns an ImageView view---
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
BitmapFactory.Options bfOptions=new BitmapFactory.Options();
bfOptions.inDither=false; //Disable Dithering mode
bfOptions.inPurgeable=true; //Tell to gc that whether it needs free memory, the Bitmap can be cleared
bfOptions.inInputShareable=true; //Which kind of reference will be used to recover the Bitmap data after being clear, when it will be used in the future
bfOptions.inTempStorage=new byte[32 * 1024];
if (convertView == null) {
imageView = new ImageView(context);
imageView.setLayoutParams(new GridView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
imageView.setPadding(0, 0, 0, 0);
} else {
imageView = (ImageView) convertView;
}
FileInputStream fs = null;
Bitmap bm;
try {
fs = new FileInputStream(new File(imgPic.get(position).toString()));
if(fs!=null) {
bm=BitmapFactory.decodeFileDescriptor(fs.getFD(), null, bfOptions);
imageView.setImageBitmap(bm);
imageView.setId(position);
imageView.setLayoutParams(new GridView.LayoutParams(200, 160));
}
} catch (IOException e) {
e.printStackTrace();
} finally{
if(fs!=null) {
try {
fs.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return imageView;
}
}
如果可以，请告诉我，否则我也可以帮助您完成整个代码。
<强> MainActivity.java
public class MainActivity extends Activity implements OnClickListener {
Button captureBtn = null;
final int CAMERA_CAPTURE = 1;
private Uri picUri;
private DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
private GridView grid;
private List<String> listOfImagesPath;
public static final String GridViewDemo_ImagePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/GridViewDemo/";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
captureBtn = (Button)findViewById(R.id.capture_btn1);
captureBtn.setOnClickListener(this);
grid = ( GridView) findViewById(R.id.gridviewimg);
listOfImagesPath = null;
listOfImagesPath = RetriveCapturedImagePath();
if(listOfImagesPath!=null){
grid.setAdapter(new ImageListAdapter(this,listOfImagesPath));
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if (arg0.getId() == R.id.capture_btn1) {
try {
//use standard intent to capture an image
Intent captureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
//we will handle the returned data in onActivityResult
startActivityForResult(captureIntent, CAMERA_CAPTURE);
} catch(ActivityNotFoundException anfe){
//display an error message
String errorMessage = "Whoops - your device doesn't support capturing images!";
Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
toast.show();
}
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
//user is returning from capturing an image using the camera
if(requestCode == CAMERA_CAPTURE){
Bundle extras = data.getExtras();
Bitmap thePic = extras.getParcelable("data");
String imgcurTime = dateFormat.format(new Date());
File imageDirectory = new File(GridViewDemo_ImagePath);
imageDirectory.mkdirs();
String _path = GridViewDemo_ImagePath + imgcurTime+".jpg";
try {
FileOutputStream out = new FileOutputStream(_path);
thePic.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.close();
} catch (FileNotFoundException e) {
e.getMessage();
} catch (IOException e) {
e.printStackTrace();
}
listOfImagesPath = null;
listOfImagesPath = RetriveCapturedImagePath();
if(listOfImagesPath!=null){
grid.setAdapter(new ImageListAdapter(this,listOfImagesPath));
}
}
}
}
private List<String> RetriveCapturedImagePath() {
List<String> tFileList = new ArrayList<String>();
File f = new File(GridViewDemo_ImagePath);
if (f.exists()) {
File[] files=f.listFiles();
Arrays.sort(files);
for(int i=0; i<files.length; i++){
File file = files[i];
if(file.isDirectory())
continue;
tFileList.add(file.getPath());
}
}
return tFileList;
}
}
<强> activity_main.xml中
<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=".MainActivity" >
<RelativeLayout
android:id="@+id/RelativeGridLayout"
android:layout_width="wrap_content"
android:layout_height="fill_parent" >
<GridView
android:id="@+id/gridviewimg"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:gravity="center"
android:numColumns="2"
android:scrollbarStyle="outsideInset"
android:smoothScrollbar="true"
android:verticalSpacing="10dp"
android:paddingBottom="50dp"
android:paddingTop="10dp" />
</RelativeLayout>
<RelativeLayout
android:id="@+id/RelativeLayout01"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:layout_alignBottom="@+id/RelativeGridLayout" >
<Button
android:id="@+id/capture_btn1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:text="Camera" />
</RelativeLayout>
</RelativeLayout>