5.基本控制元件 Button 事件處理 點選 長按 觸控
阿新 • • 發佈:2021-09-04
public class MainActivity extends AppCompatActivity { private final String zouhao = "啊啊啊啊啊: "; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button but2 = findViewById(R.id.but2);//點選事件 but2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Log.e(zouhao,"onClick"); Toast.makeText(getApplicationContext(),"onClick",Toast.LENGTH_SHORT).show(); } });//長按事件 but2.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View view) { Log.e(zouhao,"onLongClick"); Toast.makeText(getApplicationContext(),"onLongClick",Toast.LENGTH_SHORT).show();return false; } }); //觸控事件 but2.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View view, MotionEvent motionEvent) { Log.e(zouhao,"setOnTouchListener"); Toast.makeText(getApplicationContext(),"setOnTouchListener",Toast.LENGTH_SHORT).show(); return false; } }); } public void papapa(View view) { Toast.makeText(getApplicationContext(),"自定義onclick",Toast.LENGTH_SHORT).show(); } }
<Button android:id="@+id/but2" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <Button android:id="@+id/but3" android:onClick="papapa" android:layout_width="wrap_content" android:layout_height="wrap_content"/>