我正在使用 Activitygroup 概念来处理单个选项卡下的多个活动。我在选项卡的第一个活动中正在做什么，我从图库和相机中获取图像，然后当用户选择图像时，该图像应该移动到第二个活动，但是这两个活动必须保持在同一个选项卡下。这是我的代码...
TabGroupActivity.java
public class TabGroupActivity extends ActivityGroup {
private ArrayList<String> mIdList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (mIdList == null) mIdList = new ArrayList<String>();
}
@Override
public void finishFromChild(Activity child) {
LocalActivityManager manager = getLocalActivityManager();
int index = mIdList.size()-1;
if (index < 1) {
finish();
return;
}
manager.destroyActivity(mIdList.get(index), true);
mIdList.remove(index); index--;
String lastId = mIdList.get(index);
Intent lastIntent = manager.getActivity(lastId).getIntent();
Window newWindow = manager.startActivity(lastId, lastIntent);
setContentView(newWindow.getDecorView());
}
public void startChildActivity(String Id, Intent intent) {
Window window = getLocalActivityManager().startActivity(Id,intent.addFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT));
if (window != null) {
mIdList.add(Id);
setContentView(window.getDecorView());
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
//preventing default implementation previous to android.os.Build.VERSION_CODES.ECLAIR
return true;
}
return super.onKeyDown(keyCode, event);
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
onBackPressed();
return true;
}
return super.onKeyUp(keyCode, event);
}
public void onBackPressed() {
int length = mIdList.size();
if ( length > 1) {
Activity current = getLocalActivityManager().getActivity(mIdList.get(length-1));
current.finish();
}
}
}
MainActivity.java
Intent intentPics = new Intent().setClass(this, GalleryPic_First.class);
TabSpec tabPics = tabHost
.newTabSpec("Photo")
.setIndicator("Photo", ressources.getDrawable(R.drawable.icon_apple_config))
.setContent(intentPics);
GalleryPic_First .java
public class GalleryPic_First extends TabGroupActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
startChildActivity("EditActivity", new Intent(this,GalleryPic.class));
}
}
GalleryPic.java
public class GalleryPic extends Activity {
private static final int TAKE_PICTURE = 0;
private static final int REQUEST_ID = 1;
private static final int HALF = 2;
private Uri mUri;
private Bitmap mPhoto;
ImageView ivGallery, ivCamera;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gallery_pic);
ivGallery = (ImageView)findViewById(R.id.gallery);
ivCamera = (ImageView)findViewById(R.id.snap);
ivGallery.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("image/*");
getParent().startActivityForResult(intent, REQUEST_ID);
}
});
ivCamera.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent("android.media.action.IMAGE_CAPTURE");
File f = new File(Environment.getExternalStorageDirectory(), "photo.jpg");
i.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
mUri = Uri.fromFile(f);
getParent().startActivityForResult(i, TAKE_PICTURE);
}
});
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case TAKE_PICTURE:
if (resultCode == Activity.RESULT_OK && data != null)
{
getContentResolver().notifyChange(mUri, null);
ContentResolver cr = getContentResolver();
try
{
mPhoto = android.provider.MediaStore.Images.Media.getBitmap(cr, mUri);
GalleryPic_Second.bmp = mPhoto;
}
catch (Exception e)
{
Toast.makeText(this, e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
break;
case REQUEST_ID :
InputStream stream = null;
if (resultCode == Activity.RESULT_OK && data != null) {
try
{
stream = getContentResolver().openInputStream(data.getData());
Bitmap original = BitmapFactory.decodeStream(stream);
GalleryPic_Second.bmp = Bitmap.createScaledBitmap(original, original.getWidth()/HALF, original.getHeight()/HALF, true);
Intent in = new Intent(GalleryPic.this, GalleryPic_Second.class);
TabGroupActivity parent = (TabGroupActivity)getParent();
parent.startChildActivity("ArrowsActivity", in);
}
catch (Exception e)
{
e.printStackTrace();
}
if (stream != null) {
try {
stream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
break;
}
}
@Override
public void onBackPressed() {
// this.getParent().onBackPressed();
TabViewLayout parentTab = (TabViewLayout) this.getParent();
parentTab.switchTabBar(1);
}
}
GalleryPic_Second.java
public class GalleryPic_Second extends Activity {
public static Bitmap bmp;
Button btnUpload;
ImageView iv;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.transparent_dialog);
View viewToLoad = LayoutInflater.from(this.getParent()).inflate(R.layout.transparent_dialog, null);
this.setContentView(viewToLoad);
setResult(RESULT_OK);
iv = (ImageView)viewToLoad.findViewById(R.id.photo_holder);
btnUpload = (Button)viewToLoad.findViewById(R.id.upload);
iv.setImageBitmap(bmp);
btnUpload.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
finish();
}
});
}
@Override
public void onBackPressed() {
// this.getParent().onBackPressed();
finish();
}
public void onActivityResult(int reqCode, int resultCode, Intent data) {
super.onActivityResult(reqCode, resultCode, data);
}
}
但是图像没有显示在第二个活动中。这个怎么做？