XML文件
<EditText android:layout_width="match_parent" android:layout_height="wrap_content" android:inputType="phone" android:ems="10" android:id="@+id/et_number" android:layout_alignParentTop="true" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/dial_number" android:id="@+id/bt_dial" android:layout_below="@id/et_number" android:layout_alignRight="@id/et_number" android:layout_alignEnd="@id/et_number" />
第一种、匿名内部类：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button bt_dial = (Button) findViewById(R.id.bt_dial);
bt_dial.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
dialPhone();
}
});
}
第二种、自定义单击事件监听类：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et_number = (EditText) MainActivity.this.findViewById(R.id.et_number);
Button bt_dial = (Button) findViewById(R.id.bt_dial);
bt_dial.setOnClickListener(new MyListener());
}
private class MyListener implements View.OnClickListener {
@Override
public void onClick(View view) {
dialPhone();
}
}
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 MainActivity extends Activity implements View.OnClickListener {
EditText et_number;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et_number = (EditText) MainActivity.this.findViewById(R.id.et_number);
Button bt_dial = (Button) findViewById(R.id.bt_dial);
bt_dial.setOnClickListener(this);
}
public void onClick(View view) {
switch (view.getId()){
case R.id.bt_dial:
dialPhone();
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:onClick="dialPhoneMethod" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/dial_number" android:id="@+id/bt_dial" android:layout_below="@id/et_number" android:layout_alignRight="@id/et_number" android:layout_alignEnd="@id/et_number" />
public void dialPhoneMethod(View view){
dialPhone();
}
private void dialPhone() {
String number = et_number.getText().toString().trim();
if (TextUtils.isEmpty(number)){
Toast.makeText(this, "电话号码不能为空", Toast.LENGTH_LONG).show();
return;
}
Intent intent = new Intent();
intent.setAction(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:" + number));
startActivity(intent);
}
