按钮点击匿名内部类

public class MainActivity extends Activity {

private EditText et_number;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

//找到要操作的控件

et_number = (EditText) findViewById(R.id.editText1);

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

//给按钮添加点击事件 匿名内部类

btn_call.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

//获取用户输入

String number = et_number.getText().toString().trim();

//判断输入是否为空

if(TextUtils.isEmpty(number)){

//为空提示用户

Toast.makeText(MainActivity.this, "输入不能为空", Toast.LENGTH_SHORT).show();

}else{

//不为空打电话

Intent intent = new Intent();

//指定动作

intent.setAction(Intent.ACTION_CALL);

//设置数据

intent.setData(Uri.parse("tel:"+number));

startActivity(intent);

}

}

});

}

}