Activity的简单的跳转回传

最新推荐文章于 2024-02-29 15:40:40 发布

原创最新推荐文章于 2024-02-29 15:40:40 发布 · 327 阅读

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本文介绍如何在Android应用中实现两个Activity之间的数据传递与回传。通过示例代码展示了如何从一个Activity启动另一个Activity，并在返回时携带数据。

实现Activity之间的，跳转并携带数据回传回来的功能

//定义一个Activity类

public class MainActivity extends Activity {

    private TextView textView;
   @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button button=(Button) findViewById(R.id.button);
        textView = (TextView) findViewById(R.id.text);
        button.setOnClickListener(new OnClickListener() {

           @Override
           public void onClick(View arg0) {
               Intent intent = new Intent(MainActivity.this,OtherActivity.class);
               intent.putExtra("name", "张三");
               startActivityForResult(intent,200);
           }
       });

}

//接收回传回来的值，要在OnActivityResult方法中获取

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
       super.onActivityResult(requestCode, resultCode, data);
       if (requestCode==200&&resultCode==100) {
           String name = data.getStringExtra("name");
           textView.setText(name);
       }

}

//定义第二个Activity类

public class OtherActivity extends Activity {
   private Button button;
   private TextView textView;
   private String name;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_other);
       button = (Button) findViewById(R.id.button);
       textView = (TextView) findViewById(R.id.text);
       Intent intent = getIntent();
       name = intent.getStringExtra("name");
       textView.setText(name);
       button.setOnClickListener(new OnClickListener() {

           @Override
           public void onClick(View arg0) {
               Intent intent2 = new Intent();
               intent2.putExtra("name", name);
               setResult(100,intent2);
               finish();
           }
       });
   }
}