android利用startActivityForResult()方法得到另一个Activity的返回值

第一个Activity

[java]
package yyy.testandroid5;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class TestAndroid5Activity extends Activity {
    private EditText edit;
    private Button button;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        edit = (EditText) findViewById(R.id.edit);
        button = (Button) findViewById(R.id.button);

        button.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                //打开第二个Activity
                Intent intent = new Intent();
                intent.setComponent(new ComponentName("yyy.testandroid6", "yyy.testandroid6.TestAndroid6Activity"));
                intent.setAction(Intent.ACTION_VIEW);
                intent.putExtra("test", edit.getText().toString());
                startActivityForResult(intent, 0);
            }
        });

    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        if(requestCode == 0){
            edit.setText(data.getStringExtra("return"));
        }
    }

}
第二个Activity

[java]
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class TestAndroid6Activity extends Activity {

    private TextView text;
    private EditText edit;
    private Button button;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        edit = (EditText) findViewById(R.id.edit);
        button = (Button) findViewById(R.id.button);
        String str = getIntent().getStringExtra("test");
        edit.setText(str);

        button.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                //添加给第一个Activity的返回值，并设置resultCode
                Intent intent = new Intent();
                intent.putExtra("return", edit.getText().toString());
                setResult(RESULT_OK, intent);
                finish();
            }
        });
    }
}

摘自 Central-Perk的专栏

补充：移动开发 , Android ,