Android onClick用法整理

<第一種用法>在xml裡設定android:onClick

<main.xml>

<Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="doActivity"/>

<MainActivity.java>

public void doActivity(View view) {

Intent intent=new Intent();
intent.setClass(this,Second.class);
//法一:
Bundle bundle =new Bundle();
bundle.putString("name", "Wei");
intent.putExtras(bundle);
//法二:
//intent.putExtra("name", "Chen");
this.startActivity(intent);
}

就完成了buttion onClick的設定了

<第二種用法> 多個buttion各有其用途

  Button button1=(Button) this.findViewById(R.id.button1);
button1.setText(name);
button1.setOnClickListener(this);

Button button2=(Button) this.findViewById(R.id.button2);
button2.setOnClickListener(this);

               @Override
 public void onClick(View v) {
  // TODO Auto-generated method stub

 switch(v.getId()){

 case R.id.button1:
Toast.makeText(this, "Buttion1",Toast.LENGTH_SHORT).show();
break;
  case R.id.button2:
Toast.makeText(this, "Buttion2",Toast.LENGTH_SHORT).show();
break;

  }
 
}

<第三種用法>

  Button button3=(Button) this.findViewById(R.id.button3);
button3.setOnClickListener(new Foo());

  public class Foo implements OnClickListener {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(Second.this, "upper right",Toast.LENGTH_SHORT).show();
  }
}


<第四種用法>匿名內部類別註冊

  Button button4=(Button) this.findViewById(R.id.button4);
button4.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {

Toast.makeText(Second.this, "Buttion4",Toast.LENGTH_SHORT).show();
}
});