Android按返回键（后退键）Back键事件捕获的两种方法

╰+攻爆jí腚メ 2023-10-16 21:35 34阅读 0赞

package zhangphil.back;
    
    import android.support.v7.app.ActionBarActivity;
    import android.util.Log;
    import android.view.KeyEvent;
    import android.os.Bundle;
    
    public class MainActivity extends ActionBarActivity {
    
    	// 打印事件的标签
    	private final String TAG = "Phil";
    
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		Log.d(TAG, "onCreate()");
    	}
    
    	@Override
    	protected void onStart() {
    		super.onStart();
    		Log.d(TAG, "onStart()");
    	}
    
    	@Override
    	protected void onRestart() {
    		super.onRestart();
    		Log.d(TAG, "onRestart()");
    	}
    
    	@Override
    	protected void onResume() {
    		super.onResume();
    		Log.d(TAG, "onResume()");
    	}
    
    	@Override
    	protected void onPause() {
    		super.onPause();
    		Log.d(TAG, "onPause()");
    	}
    
    	@Override
    	protected void onStop() {
    		super.onStop();
    		Log.d(TAG, "onStop()");
    	}
    
    	@Override
    	protected void onDestroy() {
    		super.onDestroy();
    		Log.d(TAG, "onDestroy()");
    	}
    
    	// 捕获返回键的方法1
    	@Override
    	public boolean onKeyDown(int keyCode, KeyEvent event) {
    		if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
    			// 按下BACK，同时没有重复
    			Log.d(TAG, "onKeyDown()");
    		}
    
    		return super.onKeyDown(keyCode, event);
    	}
    
    	// 捕获返回键的方法2
    	@Override
    	public void onBackPressed() {
    		Log.d(TAG, "onBackPressed()");
    		super.onBackPressed();
    	}
    }