每日日报

//按钮Activity实现接口
public class MainActivity extends Activity implements OnClickListener {

private EditText et_number;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

// 把布局文件加载到界面上

setContentView(R.layout.activity_main);

// 找到关心的控件

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

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

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

Button btn3 = (Button) findViewById(R.id.button3);

btn_call.setOnClickListener(this);

btn2.setOnClickListener(this);

btn3.setOnClickListener(this);

}

@Override

public void onClick(View v) {

// View v 参数 当控件被点击的时候 被点击的对象就会作为参数传进来 可以通过控件的id进行区分

int id = v.getId();

switch (id) {

case R.id.button1:

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

if (TextUtils.isEmpty(number)) {

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

} else {

Intent intent = new Intent();

intent.setAction(Intent.ACTION_CALL);

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

startActivity(intent);

}

break;

case R.id.button2:

Toast.makeText(this, "按钮2被点击", Toast.LENGTH_SHORT).show();

break;

case R.id.button3:

Toast.makeText(this, "按钮3被点击", Toast.LENGTH_SHORT).show();

break;

}

}

}