[英]why Image can return to previous activity but not intent to new activity
為什么圖像可以傳遞給先前的活動，但不能傳遞給新的活動？
ImageFitScreen.java
b = (ImageView) findViewById(R.id.imageView3);
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;
// Toast.makeText(getApplicationContext(), Uri.fromFile(f) +"", Toast.LENGTH_LONG).show();
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();
bitmapOptions.inJustDecodeBounds = false;
bitmapOptions.inPreferredConfig = Bitmap.Config.RGB_565;
bitmapOptions.inDither = true;
bitmapOptions.inSampleSize=8;
bitmap = BitmapFactory.decodeFile(f.getAbsolutePath(), bitmapOptions);
Global.img = bitmap;
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);
}
}
else
{
finish();
}
}
ok.setOnClickListener(new View.OnClickListener() //back to Project1.java
{
public void onClick(View arg0)
{
Intent returnIntent=new Intent();
text=t.getText().toString();
b.setDrawingCacheEnabled(true);
b.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
b.layout(0, 0, b.getMeasuredWidth(), b.getMeasuredHeight());
b.buildDrawingCache(true);
returnIntent.putExtra("text", text);
if (b.getDrawingCache() != null) {
Bitmap bitmap = Bitmap.createBitmap(b.getDrawingCache());
if (bitmap == null) {
Log.e("TAG", "getDrawingCache() == null");
}
Global.img = bitmap;
}
setResult(Activity.RESULT_OK, returnIntent);
finish();
}
});
Project1.java
public void onActivityResult(int requestCode,int resultCode, Intent data)
{
if(requestCode==PROJECT_REQUEST_CODE) {
if(data!=null&&data.hasExtra("text")) {
c = data.getStringExtra("text");
txt1.setText(c);
viewImage.setImageBitmap(Global.img); //image can be returned
}
}
else if (requestCode==CAMERA_REQUEST_CODE)
{
}
}
b.setOnClickListener(new View.OnClickListener() { // back to Claims.java
public void onClick(View arg0) {
Intent returnIntent = new Intent();
a = "Project";
text = txt.getText().toString(); // amount
returnIntent.putExtra("text", text);
returnIntent.putExtra("a", a);
final int k1 = getIntent().getExtras().getInt("k");
returnIntent.putExtra("k1", k1);
returnIntent.putExtra("c",c);
setResult(Activity.RESULT_OK, returnIntent);
finish();
}
});
Claims.java
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case 0:
result = data.getStringExtra("text");
name = data.getStringExtra("a");
description=data.getStringExtra("c");
if (Global.img != null) {
v.setImageBitmap(Global.img); //image can shown here
}
c.setText(" " + name + "------" + "RM " + result);
break;
}
}
c.setOnClickListener(new View.OnClickListener() { //pass image to EditClaims.java
@Override
public void onClick(View v) {
if ((name != null && name.trim().length() > 0) && (result != null && result.trim().length() > 0)) {
Toast.makeText(getActivity().getApplicationContext(), "not null", Toast.LENGTH_LONG).show();
Global.img=null;
Intent intent = new Intent(getActivity(), EditClaims.class);
v.setDrawingCacheEnabled(true);
v.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
v.buildDrawingCache(true);
intent.putExtra("name", name);
intent.putExtra("result", result);
intent.putExtra("description", description);
if (v.getDrawingCache() != null) {
Bitmap bitmap = Bitmap.createBitmap(v.getDrawingCache());
if (bitmap == null) {
Log.e("TAG", "getDrawingCache() == null");
}
Global.img = bitmap;
startActivity(intent);
}
}
else {
Toast.makeText(getActivity().getApplicationContext(), "null", Toast.LENGTH_LONG).show();
}
}
} );
EditClaims.java
viewImage.setImageBitmap(Global.img);
Global.java
public class Global {
static Bitmap img;
}
但是我在viewImage中得到的是(" " + name + "------" + "RM " + result) ，它是從c.setText獲得的。 有人可以幫我解決問題嗎？
活動流程： ImageFitScreen ----->返回project1 ----->返回Claims -----> Claims為EditClaims意圖
索賠屏幕截圖
請注意，金額旁邊的圖像是從Project1返回的。 由於c.setText不為null，因此可以使用EditClaims.java 。
它像魅力一樣工作，但僅適用於captured image 。
現在，我嘗試使用image from gallery的image from gallery
當我單擊c時，它顯示了這一點。 它不是要EditClaims.java
問題出在您在c設置的OnClickListener上。 該偵聽器有一個方法public void onClick(View v) ，您在其中混淆了v變量。
從onActivityResult()方法來看，您有一個名為v的類成員ImageView 。 但是，在onClick()方法中，不合格的v將是傳遞給該方法的View v ，而不是類成員v 。 傳遞給OnClickListener的onClick()方法的View v是被單擊的View ，因此這解釋了為什么您在下一個Activity看到c的內容。
最簡單的解決方案是將onClick()方法的參數變量更改為其他名稱。 例如：
public void onClick(View view)
啟動新活動后，先前的活動是否有可能繼續通過意圖將數據發送到新活動？
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[英]Do I need to include a default Intent in order to return to the previous Activity?
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[英]Why use both Intent.FLAG_ACTIVITY_NEW_TASK and Intent.FLAG_ACTIVITY_SINGLE_TOP?
為什么我不能在PendingIntent中使用Intent.FLAG_ACTIVITY_NEW_TASK
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