android studio按鈕監聽的5種方法實例詳解

1.匿名內部類

public class MainActivity extends AppCompatActivity implements View.OnClickListener {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Button btn1 = findViewById(R.id.btn1);//匿名內部類btn1.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Toast.makeText(getApplicationContext(), “你點擊了按鈕1”, Toast.LENGTH_LONG).show();}});}

2.內部類

public class MainActivity extends AppCompatActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Button btn2 = findViewById(R.id.btn2);Btn2CLickListener btn2CLickListener = new Btn2CLickListener();btn2.setOnClickListener(btn2CLickListener);}class Btn2CLickListener implements View.OnClickListener{@Overridepublic void onClick(View v){Toast.makeText(getApplicationContext(),“你點擊了按鈕2”,Toast.LENGTH_LONG).show();}}

3外部類**

MainActivity.java：public class MainActivity extends AppCompatActivity{protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}Button btn3 = findViewById(R.id.btn3);Btn3ClickListener btn3CLickListener = new Btn3ClickListener(getApplicationContext());btn3.setOnClickListener(btn3CLickListener);}Btn3ClickListener.java：

4自身activity

public class MainActivity extends AppCompatActivity implements View.OnClickListener {protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Button btn4 = findViewById(R.id.btn4);//main activitybtn4.setOnClickListener(this);}public void onClick(View v) {Toast.makeText(getApplicationContext(), “你點擊了按鈕4”, Toast.LENGTH_SHORT).show();}}

5直接綁定到標簽

activity_main.xml：

添加 android:onClick=“myClick”。如下所示：

MainActivity.java：

public class MainActivity extends AppCompatActivity implements View.OnClickListener {public void myClick(View view) {Toast.makeText(getApplicationContext(), “你點擊了按鈕5”, Toast.LENGTH_SHORT).show();}}

總結

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