Intent的4种传值方法总结

xml 代码：

<Button

    android:id="@+id/button1"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:text="Button1" />

 

  <Button

    android:id="@+id/button2"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:text="Button2" />

第一种：匿名内部类

public class TestButtonActivity extends Activity {

 

  Button btn1, btn2;

  Toast tst;

 

  @Override

  protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_test_button);

 

    btn1 = (Button) findViewById(R.id.button1);

    btn2 = (Button) findViewById(R.id.button2);

 

    btn1.setOnClickListener(new OnClickListener() {

 

      @Override

      public void onClick(View v) {

        // TODO Auto-generated method stub

        Toast tst = Toast.makeText(TestButtonActivity.this, "111111111", Toast.LENGTH_SHORT);

        tst.show();

 

      }

    });

 

    btn2.setOnClickListener(new OnClickListener() {

 

      @Override

      public void onClick(View v) {

        // TODO Auto-generated method stub

        Toast tst = Toast.makeText(TestButtonActivity.this, "222222222", Toast.LENGTH_SHORT);

        tst.show();

      }

    });

  }

}

第二种 ：自定义单击监听事件

public class TestButtonActivity extends Activity {

 

  Button btn1, btn2;

  Toast tst;

 

  class MyClickListener implements OnClickListener {

 

    @Override

    public void onClick(View v) {

      // TODO Auto-generated method stub

      switch (v.getId()) {

      case R.id.button1:

        tst = Toast.makeText(TestButtonActivity.this, "111111111", Toast.LENGTH_SHORT);

        tst.show();

        break;

      case R.id.button2:

        tst = Toast.makeText(TestButtonActivity.this, "222222222", Toast.LENGTH_SHORT);

        tst.show();

        break;

      default:

        break;

      }

    }

  }

 

  @Override

  protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_test_button);

 

    btn1 = (Button) findViewById(R.id.button1);

    btn2 = (Button) findViewById(R.id.button2);

 

    btn1.setOnClickListener(new MyClickListener());

    btn2.setOnClickListener(new MyClickListener());

  }

}

第三种：

Activity继承View.OnClickListener，由Activity实现OnClick(View view)方法，

在OnClick(View view)方法中用switch-case对不同id代表的button进行相应的处理

public class TestButtonActivity extends Activity implements OnClickListener {

 

  Button btn1, btn2;

  Toast tst;

 

  @Override

  protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_test_button);

 

    btn1 = (Button) findViewById(R.id.button1);

    btn2 = (Button) findViewById(R.id.button2);

 

    btn1.setOnClickListener(this);

    btn2.setOnClickListener(this);

  }

 

  @Override

  public void onClick(View v) {

    // TODO Auto-generated method stub

    switch (v.getId()) {

    case R.id.button1:

      tst = Toast.makeText(this, "111111111", Toast.LENGTH_SHORT);

      tst.show();

      break;

    case R.id.button2:

      tst = Toast.makeText(this, "222222222", Toast.LENGTH_SHORT);

      tst.show();

      break;

    default:

      break;

    }

  }

}

第四种：在XML文件中“显示指定按钮的onClick属性，

这样点击按钮时会利用反射的方式调用对应Activity中的click()方法”

<Button

    android:id="@+id/button1"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:onClick="onClick"

    android:text="Button1" />

 

  <Button

    android:id="@+id/button2"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:onClick="onClick"

    android:text="Button2" />

 

public class TestButtonActivity extends Activity {

 

  Button btn1, btn2;

  Toast tst;

 

  @Override

  protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_test_button);

  }

 

  // 注意 这里没有 @Override 标签

  public void onClick(View v) {

    // TODO Auto-generated method stub

    switch (v.getId()) {

    case R.id.button1:

      tst = Toast.makeText(this, "111111111", Toast.LENGTH_SHORT);

      tst.show();

      break;

    case R.id.button2:

      tst = Toast.makeText(this, "222222222", Toast.LENGTH_SHORT);

      tst.show();

      break;

    default:

      break;

    }

  }

}

 

 

按钮少的时候用匿名内部类会比较快，比如写demo测试的时候或者登陆界面之类的。

按钮多的情况我还是选择第三种方法，方便。

关于第四种方法，我感觉最方便，但看了很多代码还是觉得写法不够大众化，感兴趣的朋友可以对此研究研究。