多个Ativity值传递FLAG_ACTIVITY_FORWARD_RESULT

需求场景为A——>B——>C 三个跳转

1.a将数据交给b处理

2.b处理完数据(finish())

3.b处理完数据 结果传给c来加工，c处理完把结果返回给a

数据处理中间层b启动c要加上

intent.addFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);

FLAG_ACTIVITY_FORWARD_RESULT主要作用:

如果设置，并且这个Intent用于从一个存在的Activity启动一个新的Activity，那么，这个作为答复目标的Activity将会传到这个新的Activity中。这种方式下，新的Activity可以调用setResult(int)，并且这个结果值将发送给那个作为答复目标的Activity。

link:Flags列表

A界面

/**
* Created by qinwei on 2016/3/3 17:44
* email:qinwei_it@163.com
*/
public class AActivity extends BaseActivity {
@Override
protected void setContentView() {
setContentView(R.layout.a0);
}

@Override
protected void initializeData() {

}

public void goB(View v){
Intent intent=new Intent(this,BActivity.class);
startActivityForResult(intent,200);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode==RESULT_OK){
TextView mLabel = (TextView) findViewById(R.id.mLabel);
mLabel.setText(data.getStringExtra("data"));
}
}
}

B界面

/**
* Created by qinwei on 2016/3/3 17:44
* email:qinwei_it@163.com
*/
public class BActivity extends BaseActivity {
@Override
protected void setContentView() {
setContentView(R.layout.a1);
}

@Override
protected void initializeData() {

}
public void goC(View v){
Intent intent=new Intent(this,CActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
startActivity(intent);
finish();
}
}

C界面

/**
* Created by qinwei on 2016/3/3 17:44
* email:qinwei_it@163.com
*/
public class CActivity extends BaseActivity {
@Override
protected void setContentView() {
setContentView(R.layout.a2);
}

@Override
protected void initializeData() {

}

public void goA(View v){
Intent intent=new Intent();
EditText editText = (EditText) findViewById(R.id.editText);
intent.putExtra("data",editText.getText().toString().trim());
setResult(RESULT_OK,intent);
finish();
}
}