我想知道onActivityResult()
是否可以在Fragment中使用,如果是,那么它是如何工作的,请举例说明。
答案 0 :(得分:19)
你会打电话:
startActivityForResult(i, 1);
然后:
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
//super.onActivityResult(requestCode, resultCode, data); comment this unless you want to pass your result to the activity.
}
答案 1 :(得分:3)
当然它会起作用,它会像活动一样工作。你有电话startActivityForResult(intent, requestCode);
通常会得到结果
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
}
答案 2 :(得分:2)
是的,你可以在Fragment.like这个
中使用OnActivityResultpublic void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
// perform your action here
}
现在你像这样调用onActivityResult
getActivity().startActivityForResult().
修改强>
以上答案陈旧
答案 3 :(得分:2)
在活动中使用此代码。
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
Fragment fragment = (Fragment) getSupportFragmentManager().findFragmentByTag(childTag);
if (fragment != null) {
fragment.onActivityResult(requestCode, resultCode, intent);
}
}
答案 4 :(得分:1)
如果您在片段中调用startActivityForResult()
,则结果将传递给父活动。
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);//will deliver result to desired fragment.
}
如何运作
如果您在活动中看到requestCode,它将像655545,现在
super.onActivityResult()将计算所需的片段和请求代码。
如果使用
找到ViewPager中所需片段索引的片段requestCode>>16
和requestCode&0xffff
找到requestCode。
答案 5 :(得分:0)
In kotlin: - I can explain using two classes. if user go from one Activity to Another Activty and in back want data then this code help you
In class Abc
startActivityForResult(Intent(context, Bcd::class.java), 141)
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
if (requestCode == 141) {
if (data!!.extras.get("add").equals("safal")) {
Log.e("Print Name",data!!.extras.get("add"))
}
}
}
In Class Bcd
val intent = Intent()
intent.putExtra("add", "safal")
setResult(Activity.RESULT_OK, intent)
答案 6 :(得分:0)
您可以轻松在android studio 3.5中的Fragment中调用onActivityResult
,首先,应该有一个活动来获得结果。 OnActivity结果意味着必须在提示时提供结果视图。 现在,在上一个活动中,说
第一个是活动,另一个是第二个活动中的片段
首次活动的Xml代码可能如下:
<RelativeLayout
xmlns:androclass="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<TextView
android:id="@+id/t1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button1"
android:layout_alignParentTop="true"
android:layout_marginTop="48dp"
android:text="Default Message" />
<Button
android:id="@+id/b1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView1"
android:layout_centerHorizontal="true"
android:layout_marginTop="42dp"
android:text="GetMessage" />
</RelativeLayout>
第二个XML代码将
<RelativeLayout xmlns:androclass="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=".SecondActivity" >
<EditText
android:id="@+id/et1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="61dp"
android:layout_toRightOf="@+id/textView1"
android:ems="10" />
<TextView
android:id="@+id/t1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/editText1"
android:layout_alignBottom="@+id/editText1"
android:layout_alignParentLeft="true"
android:text="Enter Message:" />
<Button
android:id="@+id/b1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/editText1"
android:layout_centerHorizontal="true"
android:layout_marginTop="34dp"
android:text="Submit" />
</RelativeLayout>
现在,我们将添加startActivityForResult()方法和onActivityResult()方法
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode==2)
{
String message=data.getStringExtra("MESSAGE");
if (message!=null){
profileNameText.setText(message);
}
}
}
@Override
public void onClick(View v) {
Intent i ;
switch (v.getId()){
case R.id.profile_option_menu:
Log.i("profileclicked","profile_menu_image_clicked()");
PopupMenu popupMenu = new PopupMenu(getActivity(),v);
MenuInflater inflater = popupMenu.getMenuInflater();
inflater.inflate(R.menu.profile_menu,popupMenu.getMenu());
popupMenu.show();
popupMenu.setOnMenuItemClickListener(new
PopupMenu.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
Intent i;
switch (item.getItemId()) {
case R.id.edit_det:
i = new Intent(getActivity().getApplicationContext(),
FirstActivity.class);
startActivityForResult(i, 2);
return true;
default:
return onOptionsItemSelected(item);
}
}
});
break;
}
}
第一个活动类的代码将是这样
public class FirstActivity extends Activity {
EditText editText1;
Button button1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
editText1=(EditText)findViewById(R.id.et1);
button1=(Button)findViewById(R.id.b1);
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
String message=editText1.getText().toString();
Intent intent=new Intent();
intent.putExtra("MESSAGE",message);
setResult(2,intent);
finish();//finishing activity
}
});
}
这里我正在编写一个方法setResult(2,intent),其中2是结果代码,它将在第一个活动类的片段内进行检查,它将检查结果代码,如果条件满足,则它将更改内部的文本TextView。
答案 7 :(得分:0)
在 Kotlin 中,我们可以通过以下非常简单的方式完成此操作:
在 ExampleFragment.kt 中,让我们开始活动以拍摄图像。
private val REQUEST_CODE_GALLERY = 101
private fun openGallery() {
val intent = Intent(Intent.ACTION_PICK)
intent.type = "image/*"
requireActivity().startActivityFromFragment(this, intent, REQUEST_CODE_GALLERY)
}
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
if(resultCode == Activity.RESULT_OK && requestCode == REQUEST_CODE_GALLERY) {
Log.d("TAG", "${data.toString()}")
}
}
希望,这会有所帮助!