android studio按钮监听的5种方法实例详解
1.匿名内部类
public class MainActivity extends AppCompatActivity implements View.OnClickListener { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button btn1 = findViewById(R.id.btn1);//匿名内部类 btn1.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Toast.makeText(getApplicationContext(), “你点击了按钮1”, Toast.LENGTH_LONG).show(); } }); }
2.内部类
public class MainActivity extends AppCompatActivity { @Override protected 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{ @Override public void onClick(View v){ Toast.makeText(getApplicationContext(),“你点击了按钮2”,Toast.LENGTH_LONG).show(); } }
3外部类**
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 activity btn4.setOnClickListener(this); } public void onClick(View v) { Toast.makeText(getApplicationContext(), “你点击了按钮4”, Toast.LENGTH_SHORT).show(); } }
5直接绑定到标签
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(), “你点击了按钮5”, Toast.LENGTH_SHORT).show(); } }
总结
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