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:[e-mail] */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:[e-mail] */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:[e-mail] */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();    }}