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适用情况：多个Activity的值传递。ActivityA到达ActivityB再到达ActivityC，但ActivityB为过渡页可以finish了，此时ActivityC将值透传至ActivityA。
其实只要利用Intent的FLAG_ACTIVITY_FORWARD_RESULT即可。
第一个页面：A跳到B
<span style="font-size:18px;">public class ActivityA extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent intent = new Intent(this, ActivityB.class);
startActivityForResult(intent, 100);
}
@Override
protected void onActivityResult(int arg0, int arg1, Intent arg2) {
super.onActivityResult(arg0, arg1, arg2);
if(arg2 != null)
{
Log.e("yanru", "requestCode="+arg0+",resultCode="+arg1+",data="+arg2.getIntExtra("a", 8));
}
}
}</span>过渡页：中间有再多过渡页也是一样。B跳到C
<span style="font-size:18px;">public class ActivityB extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = new Intent(this, ActivityC.class);
intent.setFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
startActivity(intent);
finish();
}
}</span>C传值然后在A的OnActivityResult中获取值
<span style="font-size:18px;">public class ActivityC extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
intent.putExtra("a", 8);
setResult(Activity.RESULT_OK, intent);
finish();
}
}</span>
android--多个Ativity值传递FLAG_ACTIVITY_FORWARD_RESULT
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原文地址：http://blog.csdn.net/ymlxku/article/details/43562851
