我有以下活动屏幕
活动A - 包含链接到活动B的按钮
活动B - 包含订单确认,然后是下一个按钮,打开活动C(捕获签名)
活动C - 弹出一个对话框,供用户输入签名和完整按钮。
活动A - 包含意图开始启动活动B并实现onActivityForResult
Intent intent = new Intent( this, ConfirmLines.class );
startActivityForResult( intent, GET_SIGNATURE );
protected void onActivityResult( int requestCode, int resultCode, Intent intent )
{
super.onActivityResult( requestCode, resultCode, intent );
switch ( requestCode )
{
case GET_SIGNATURE:
if ( resultCode == RESULT_OK )
{
getIntent().putExtra( SIGNATURE_DATA, intent.getStringExtra( SignatureCapture.SIGNATURE_RESULT ) );
getIntent().putExtra( SIGNATURE_TIME, "34552655544" ); // todo - remove hardcoded signature time
showDialog( PRINT_NAME );
}
else
{
//reset data after a cancel/back from signature screen
getIntent().putExtra( SignatureCapture.SIGNATURE_RESULT, "" );
}
break;
}
}
活动B - 包含启动签名捕获意图的代码以及返回活动A的onActivityForResult。
final Intent intent = new Intent( this, SignatureCapture.class );
startActivityForResult( intent, GET_SIGNATURE );
@Override
protected void onActivityResult( int requestCode, int resultCode, Intent intent )
{
super.onActivityResult( requestCode, resultCode, intent );
switch ( requestCode )
{
case GET_SIGNATURE:
if ( resultCode == RESULT_OK )
{
finish();
}
}
}
活动C - 包含签名捕获代码和完整按钮
public void onClick( View view )
{
switch ( view.getId() )
{
case R.id.button_cancel:
dismiss();
nameValue.setText( "" );
notesValue.setText( "" );
imageView_button.setImageBitmap( null );
break;
case R.id.button_confirm:
final String printedText = String.valueOf( nameValue.getText() );
if ( printedText.isEmpty() )
{
Toast.makeText( getContext(), "Please enter a name", Toast.LENGTH_SHORT ).show();
}
else
{
if ( mDialogResult != null )
{
mDialogResult.finish( String.valueOf( nameValue.getText() ), String.valueOf( notesValue.getText() ) );
}
nameValue.setText( "" );
notesValue.setText( "" );
dismiss();
}
break;
}
}
当我返回活动A时,卡住,resultCode等于0,定义为结果被取消。
它正在拾取正确的requestCode,因为它最初是从Activity A开始的,但只是这个resultCode似乎是问题,如果有人能看出原因?
从活动C返回时,是否可能从活动B调用finish()?
另外,我需要将Intent数据从Activity C传递给A.如果我在Activity A中有finish(),那么我在活动A中有完成(),然后它不会放入onActivityForResult。
感谢您提供高级帮助:]
答案 0 :(得分:18)
如果您希望将活动C的结果传回活动A:
从活动A开始活动B:
Intent showB = new Intent(ActivityA, ActivityB);
startActivityForResult(showB, RequestCode);
在活动B中调用C:
Intent showC = new Intent(ActivityC);
showC.setFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
startActivity(showC);
finish(); //Close Activity B
在C:
//set the result code and close the activity
Intent result = new Intent();
setResult(resultCode, result);//like RESULT_OK
finish();
在A:
public void onActivityResult(int requestCode, int resultCode, Intent data) {
...... handle RequestCode here
}
答案 1 :(得分:2)
从活动C返回时,是否可能从活动B调用finish()?
是。您需要在
的活动B中将结果设置为OKcase GET_SIGNATURE:
if ( resultCode == RESULT_OK )
{
// here you need set it to OK before calling finish
finish();
}
。