在活动B上，选择图像。现在，我希望在单击活动B中的ok button时，图像返回到活动A.
有人可以举例说明如何退回图片吗？还是一个链接？
问候。
活动A
public void addListenerOnButton() {
imageButton = (ImageButton) findViewById(R.id.imageButton);
imageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent i = new Intent(A, B.class);
startActivityForResult(i, PROJECT_REQUEST_CODE);
}
});
}
public void onActivityResult(int requestCode,int resultCode, Intent data)
{
if(requestCode==PROJECT_REQUEST_CODE) {
c= data.getStringExtra("text");
txt1.setText(c); // return text
//how about image?
}
else if (requestCode==CAMERA_REQUEST_CODE)
{
}
}
活动B
ok.setOnClickListener(new View.OnClickListener()
{
public void onClick(View arg0)
{
Intent returnIntent=new Intent();
text=t.getText().toString();
returnIntent.putExtra("text",text);
setResult(Activity.RESULT_OK, returnIntent);
finish();
}
});
}
public void selectImage() {
final CharSequence[]
options = { "Take Photo", "Choose from Gallery","Cancel" };
AlertDialog.Builder builder = new AlertDialog.Builder(ImageFitScreen.this);
builder.setTitle("Add Photo!");
builder.setItems(options, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int item) {
if (options[item].equals("Take Photo"))
{
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File f = new File(android.os.Environment.getExternalStorageDirectory(), "temp.jpg");
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
//pic = f;
startActivityForResult(intent, 1);
} else if (options[item].equals("Choose from Gallery"))
{
Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, 2);
} else if (options[item].equals("Cancel")) {
dialog.dismiss();
finish();
}
}
});
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == 1) {
//h=0;
File f = new File(Environment.getExternalStorageDirectory().toString());
for (File temp : f.listFiles()) {
if (temp.getName().equals("temp.jpg")) {
f = temp;
File photo = new File(Environment.getExternalStorageDirectory(), "temp.jpg");
//pic = photo;
break;
}
}
try {
Bitmap bitmap;
BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();
bitmap = BitmapFactory.decodeFile(f.getAbsolutePath(),
bitmapOptions);
b.setImageBitmap(bitmap);
String path = android.os.Environment
.getExternalStorageDirectory()
+ File.separator
+ "Phoenix" + File.separator + "default";
//p = path;
f.delete();
OutputStream outFile = null;
File file = new File(path, String.valueOf(System.currentTimeMillis()) + ".jpg");
try {
outFile = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.JPEG, 85, outFile);
//pic=file;
outFile.flush();
outFile.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
} catch (Exception e) {
e.printStackTrace();
}
} else if (requestCode == 2) {
Uri selectedImage = data.getData();
// h=1;
//imgui = selectedImage;
String[] filePath = {MediaStore.Images.Media.DATA};
Cursor c = getContentResolver().query(selectedImage, filePath, null, null, null);
c.moveToFirst();
int columnIndex = c.getColumnIndex(filePath[0]);
String picturePath = c.getString(columnIndex);
c.close();
Bitmap thumbnail = (BitmapFactory.decodeFile(picturePath));
Log.w("path of image ******", picturePath + "");
b.setImageBitmap(thumbnail);
}
}
}
}
答案 0 :(得分：0)
您可以在以下活动之间传递Bitmap（在捆绑中）：https://stackoverflow.com/a/2459624/2738172
来自ImageView的getBitmap：
ImageView.buildDrawingCache();
Bitmap bmap = ImageView.getDrawingCache();
<强>更新
在你的情况下。 在活动B中：
ok.setOnClickListener(new View.OnClickListener()
{
public void onClick(View arg0)
{
Intent returnIntent=new Intent();
b.buildDrawingCache();
returnIntent.putExtra("BitmapImage", b.getDrawingCache());
setResult(Activity.RESULT_OK, returnIntent);
finish();
}
});
（onActivityResult方法）：
if(requestCode==PROJECT_REQUEST_CODE) {
Bitmap bitmap = (Bitmap) data.getParcelableExtra("BitmapImage");
imageButton.setImageBitmap(bitmap);
}