我有三个活动
-
MessagesAttachPhotoActivity -
MessageGalleryFolderSelectorActivity -
ImagePickerActivity
MessagesAttachPhotoActivity用startActivityForResult()呼叫MessageGalleryFolderSelectorActivity。
MessageGalleryFolderSelectorActivity活动显示手机上的照片文件夹，并选择一个文件夹。
setActivityForResult()调用 ImagePickerActivity。一旦从ImagePickerActivity中选择了图像，它将通过MessageGalleryFolderSelectorActivity传递回MessagesAttachPhotoActivity。
当我第一次运行应用程序时，一切都很好。但是，如果我尝试之后再次选择图像，MessageGalleryFolderSelectorActivity不会在setResult()之后关闭。
我试着打电话给finish(), this.finish(), ((Activity)getApplicationContext()).finish()和super.onBackPressed()没有成功。
为什么活动在连续运行时没有关闭?
下面是我的代码:调用MessageGalleryFolderSelectorActivity:
Intent intent;
Bundle arguments = new Bundle();
Bundle bundle;
intent = new Intent(this, MessageGalleryFolderSelectorActivity.class);
bundle = new Bundle();
bundle.putInt(Constants.INTENT_EXTRA_LIMIT, Constants.IMAGES_SELECT_LIMIT);
bundle.putInt("Request", MessageThread.MessageType.IMAGE);
intent.putExtras(bundle);
startActivityForResult(intent, MessageThread.MessageType.IMAGE);
ImagePickerActivity:
imagesIntent.putExtra(ImagePickerActivity.INTENT_EXTRA_MODE,
ImagePickerActivity.MODE_MULTIPLE);
imagesIntent.putExtra(ImagePickerActivity.INTENT_EXTRA_LIMIT, 10);
imagesIntent.putExtra(ImagePickerActivity.INTENT_EXTRA_SHOW_CAMERA, false);
imagesIntent.putExtra(ImagePickerActivity.INTENT_EXTRA_ALBUM,album);
//imagesIntent.putExtra(ImagePickerActivity.INTENT_EXTRA_SELECTED_IMAGES, images);
startActivityForResult(imagesIntent, MessageThread.MessageType.IMAGE);
将数据传回MessageGalleryFolderSelectorActivity:
Intent data = new Intent();
data.putParcelableArrayListExtra
(ImagePickerActivity.INTENT_EXTRA_SELECTED_IMAGES, selectedImages);
data.putExtra(ImagePickerActivity.INTENT_EXTRA_ALBUM,album);
setResult(RESULT_OK, data);
finish();
return true;
尝试将数据传递回初始调用活动，但此活动没有关闭MessageGalleryFolderSelectorActivity:
@Override
protected void onActivityResult(int requestCode, int resultCode, final Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
ArrayList<Image> selectedImages = data.getParcelableArrayListExtra
(ImagePickerActivity.INTENT_EXTRA_SELECTED_IMAGES);
String album = data.getStringExtra(ImagePickerActivity.INTENT_EXTRA_ALBUM);
Intent intent = new Intent();
intent.putExtra(ImagePickerActivity.INTENT_EXTRA_ALBUM, album);
intent.putParcelableArrayListExtra
(ImagePickerActivity.INTENT_EXTRA_SELECTED_IMAGES, selectedImages);
setResult(Activity.RESULT_OK, intent);
this.finish();
return;
} else if (resultCode == RESULT_CANCELED) {
}
}
我认为我们可以使用getParent()来引用父activity。因此，在MessageGalleryFolderSelectorActivity类中，我们可以在重写的onActivityResult上编写((Activity)getParent() . onActivityResult (requestCode,resultCode,data)。因此，我们将得到的值移交给父值而不处理它
尝试在活动上使用finishAffinity()而不是finish()。
它的工作很好，我已经检查了同样的事情与3个活动:1. MainActivity2. SecondActivity3.ThirdActivity
在MainActivity中，我通过点击按钮启动了SecondActivity，代码如下:
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
nextclick();
}
});
}
public void nextclick()
{
Intent intent=new Intent(MainActivity.this, SecondAcivity.class);
startActivityForResult(intent,1);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode)
{
case 1:
break;
}
}
在SecondActivity中，我已经通过点击floatingActionButton启动了ThirdActivity，代码如下:
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
nextclick();
}
});
}
public void nextclick() {
Intent intent = new Intent(SecondAcivity.this, ThirdActivity.class);
startActivityForResult(intent, 2);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
switch (requestCode) {
case 2:
//Set data for MainActivity
Intent intent = new Intent();
intent.putExtra("album", "dfdfd");
setResult(RESULT_OK, intent);
SecondActivity.this.finish();
break;
}
}
}
在ThirdActivity中，我已经通过点击floatingActionButton启动了ThirdActivity，代码如下:
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//Set data for SecondActivity
Intent data = new Intent();
data.putExtra("album","album");
setResult(RESULT_OK, data);
finish();
}
});
}
我尝试了同样的逻辑与三个活动像这样
活动 public class A extends AppCompatActivity {
private static final int BCODE = 100;
private String Tag="A Activity";
Button triggerButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
triggerButton= (Button) findViewById(R.id.triggerButton);
triggerButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent;
Bundle arguments = new Bundle();
intent = new Intent(A.this, B.class);
intent.putExtras(arguments);
startActivityForResult(intent, BCODE);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode==BCODE){
if(resultCode==RESULT_OK){
Log.e(Tag,"succes");
}
}
}
}
通过startActivityForResult传递intent来启动activity B
从活动B我再次做同样的事情
public class B extends AppCompatActivity {
private static final int CCODE =200 ;
private String Tag="Activity B";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_b);
Intent intent;
Bundle arguments = new Bundle();
intent = new Intent(this, C.class);
intent.putExtras(arguments);
startActivityForResult(intent, CCODE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode==CCODE){
if(resultCode==RESULT_OK){
Log.e(Tag,"suceess");
setResult(RESULT_OK,new Intent());
finish();
}
}
}
}
在活动C中，我在设置结果后刚刚完成活动
public class C extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_c);
setResult(RESULT_OK,new Intent());
finish();
}
}
当活动C完成时，os将恢复活动B并调用onActivityResult()。在活动B的onActivityResult中，我正在设置结果并完成活动。然后操作系统将恢复活动B并调用活动a的onActivity结果。我尝试了很多次，这个场景对我来说工作得很好。