android.view.KeyEvent#KEYCODE_BACK源码实例Demo

下面列出了android.view.KeyEvent#KEYCODE_BACK 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。

源代码1 项目： WanAndroid 文件： MainActivity.java


@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {

    if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_DOWN) {

        if (mDrawerLayout.isDrawerOpen(Gravity.START)) {
            mDrawerLayout.closeDrawer(Gravity.START);
            return true;
        }

        if (System.currentTimeMillis() - mExitTime < 2000) {
            finish();
        } else {
            mExitTime = System.currentTimeMillis();
            ToastUtils.showToast(AppContext.getContext(), "请再按一次退出程序");
        }
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

源代码2 项目： Gank-Veaer 文件： GankWebActivity.java


@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (event.getAction() == KeyEvent.ACTION_DOWN) {
        switch (keyCode) {
            case KeyEvent.KEYCODE_BACK:
                if (mWebView.canGoBack()) {
                    mWebView.goBack();
                }
                else {
                    finish();
                }
                return true;
        }
    }
    return super.onKeyDown(keyCode, event);
}

源代码3 项目： 365browser 文件： FindToolbar.java


@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
            // Tell the framework to start tracking this event.
            getKeyDispatcherState().startTracking(event, this);
            return true;
        } else if (event.getAction() == KeyEvent.ACTION_UP) {
            getKeyDispatcherState().handleUpEvent(event);
            if (event.isTracking() && !event.isCanceled()) {
                mFindToolbar.deactivate();
                return true;
            }
        }
    }
    return false;
}

源代码4 项目： YCAudioPlayer 文件： MainActivity.java


/**
 * 是当某个按键被按下是触发。所以也有人在点击返回键的时候去执行该方法来做判断
 */
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    LogUtils.e("触摸监听", "onKeyDown");
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        if (mPlayFragment != null && isPlayFragmentShow) {
            hidePlayingFragment();
        }else {
            //双击返回桌面
            if ((System.currentTimeMillis() - time > 1000)) {
                ToastUtils.showRoundRectToast("再按一次返回桌面");
                time = System.currentTimeMillis();
            } else {
                moveTaskToBack(true);
            }
        }
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

源代码5 项目： product-emm 文件： RegistrationActivity.java


@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
	if (keyCode == KeyEvent.KEYCODE_BACK) {
		Intent i = new Intent();
		i.setAction(Intent.ACTION_MAIN);
		i.addCategory(Intent.CATEGORY_HOME);
		this.startActivity(i);
		finish();
		return true;
	} else if (keyCode == KeyEvent.KEYCODE_HOME) {
		finish();
		return true;
	}
	return super.onKeyDown(keyCode, event);
}

源代码6 项目： phonegapbootcampsite 文件： CordovaActivity.java


@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
    //Determine if the focus is on the current view or not
    if (appView != null && appView.getFocusedChild() != null && (keyCode == KeyEvent.KEYCODE_BACK || keyCode == KeyEvent.KEYCODE_MENU)) {
                return appView.onKeyDown(keyCode, event);
    }
    else
        return super.onKeyDown(keyCode, event);
}

源代码7 项目： Android-PickerView 文件： BasePickerView.java


@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == MotionEvent.ACTION_DOWN && isShowing()) {
        dismiss();
        return true;
    }
    return false;
}

源代码8 项目： diycode 文件： TopicContentActivity.java


@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        finish();
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

源代码9 项目： Os-FileUp 文件： MainActivity.java


@Override
public boolean onKeyDown(int keyCode, @NonNull KeyEvent event){
    if(event.getAction() == KeyEvent.ACTION_DOWN){
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            if (webView.canGoBack()) {
                webView.goBack();
            } else {
                finish();
            }
            return true;
        }
    }
    return super.onKeyDown(keyCode, event);
}

源代码10 项目： ShareBox 文件： IjkVideoView.java


@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    boolean isKeyCodeSupported = keyCode != KeyEvent.KEYCODE_BACK &&
            keyCode != KeyEvent.KEYCODE_VOLUME_UP &&
            keyCode != KeyEvent.KEYCODE_VOLUME_DOWN &&
            keyCode != KeyEvent.KEYCODE_VOLUME_MUTE &&
            keyCode != KeyEvent.KEYCODE_MENU &&
            keyCode != KeyEvent.KEYCODE_CALL &&
            keyCode != KeyEvent.KEYCODE_ENDCALL;
    if (isInPlaybackState() && isKeyCodeSupported && mMediaController != null) {
        if (keyCode == KeyEvent.KEYCODE_HEADSETHOOK ||
                keyCode == KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE) {
            if (mMediaPlayer.isPlaying()) {
                pause();
                mMediaController.show();
            } else {
                start();
                mMediaController.hide();
            }
            return true;
        } else if (keyCode == KeyEvent.KEYCODE_MEDIA_PLAY) {
            if (!mMediaPlayer.isPlaying()) {
                start();
                mMediaController.hide();
            }
            return true;
        } else if (keyCode == KeyEvent.KEYCODE_MEDIA_STOP
                || keyCode == KeyEvent.KEYCODE_MEDIA_PAUSE) {
            if (mMediaPlayer.isPlaying()) {
                pause();
                mMediaController.show();
            }
            return true;
        } else {
            toggleMediaControlsVisiblity();
        }
    }

    return super.onKeyDown(keyCode, event);
}

源代码11 项目： Modularity 文件： MainActivity.java


private boolean handleExitTip(int keyCode) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        if (isOnKeyBacking) {
            mMainLoopHandler.removeCallbacks(onBackTimeRunnable);
            isOnKeyBacking = false;
            finish();
        } else {
            isOnKeyBacking = true;
            showExitTip();
            mMainLoopHandler.postDelayed(onBackTimeRunnable, 2000);
        }
        return true;
    }
    return false;
}

源代码12 项目： sopa 文件： GameActivity.java


@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {

    if (keyCode == KeyEvent.KEYCODE_BACK) {
        ResourcesManager.getInstance().storyService.getCurrentScene().onBackKeyPressed();
    }

    return false;
}

源代码13 项目： GifAssistant 文件： WelcomeActivity.java


@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
	// TODO Auto-generated method stub
	if(keyCode == KeyEvent.KEYCODE_BACK) {
		return false;
	}
	return false;
}

源代码14 项目： Search-View-Layout 文件： SearchViewLayout.java


@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_DOWN &&
            isExpanded()) {
        boolean keyboardHidden = Utils.hideInputMethod(v);
        if (keyboardHidden) return true;
        collapse();
        return true;
    }
    return false;
}

源代码15 项目： quickmark 文件： UnlockGesturePasswordActivity.java


public boolean onKeyDown(int keyCode, KeyEvent event) {
	if (keyCode == KeyEvent.KEYCODE_BACK) { // ���/����/���η��ؼ�
		if ((flag == "clear") || (flag == "md") || (flag == "enable")) {
			finish();
		} else {
			dialogShowUtil.dialogShow("shake", "quit", "", "");
		}
		return true;
	}
	return super.onKeyDown(keyCode, event);
}

源代码16 项目： Earlybird 文件： Cocos2dxEditText.java


@Override
public boolean onKeyDown(final int keyCode, final KeyEvent keyEvent) {
	super.onKeyDown(keyCode, keyEvent);

	/* Let GlSurfaceView get focus if back key is input. */
	if (keyCode == KeyEvent.KEYCODE_BACK) {
		//Cocos2dxHelper.nativeRequestFocus();
	}

	return true;
}

源代码17 项目： GOpenSource_AppKit_Android_AS 文件： GosDeviceReadyActivity.java


@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
	if (keyCode == KeyEvent.KEYCODE_BACK) {
		quitAlert(this);
		return true;
	}
	return false;
}

源代码18 项目： cordova-plugin-app-update-demo 文件： CordovaWebViewImpl.java


@Override
public Boolean onDispatchKeyEvent(KeyEvent event) {
    int keyCode = event.getKeyCode();
    boolean isBackButton = keyCode == KeyEvent.KEYCODE_BACK;
    if (event.getAction() == KeyEvent.ACTION_DOWN) {
        if (isBackButton && mCustomView != null) {
            return true;
        } else if (boundKeyCodes.contains(keyCode)) {
            return true;
        } else if (isBackButton) {
            return engine.canGoBack();
        }
    } else if (event.getAction() == KeyEvent.ACTION_UP) {
        if (isBackButton && mCustomView != null) {
            hideCustomView();
            return true;
        } else if (boundKeyCodes.contains(keyCode)) {
            String eventName = null;
            switch (keyCode) {
                case KeyEvent.KEYCODE_VOLUME_DOWN:
                    eventName = "volumedownbutton";
                    break;
                case KeyEvent.KEYCODE_VOLUME_UP:
                    eventName = "volumeupbutton";
                    break;
                case KeyEvent.KEYCODE_SEARCH:
                    eventName = "searchbutton";
                    break;
                case KeyEvent.KEYCODE_MENU:
                    eventName = "menubutton";
                    break;
                case KeyEvent.KEYCODE_BACK:
                    eventName = "backbutton";
                    break;
            }
            if (eventName != null) {
                sendJavascriptEvent(eventName);
                return true;
            }
        } else if (isBackButton) {
            return engine.goBack();
        }
    }
    return null;
}

源代码19 项目： gdx-controllerutils 文件： AndroidControllers.java


@Override
public boolean onKey (View view, int keyCode, KeyEvent keyEvent) {
	if (ignoreNoGamepadButtons && !keyEvent.isGamepadButton(keyCode)) {
		return false;
	}
	AndroidController controller = controllerMap.get(keyEvent.getDeviceId());
	if(controller != null) {
		if(controller.getButton(keyCode) && keyEvent.getAction() == KeyEvent.ACTION_DOWN) {
			return true;
		}
		synchronized(eventQueue) {
			AndroidControllerEvent event = eventPool.obtain();
			event.controller = controller;
			if(keyEvent.getAction() == KeyEvent.ACTION_DOWN) {
				if (keyCode == KeyEvent.KEYCODE_DPAD_UP) {
					event.type = AndroidControllerEvent.POV;
					controller.pov |= 0x00000001;
					event.povDirection = controller.getPov(0);
				} else if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN) {
					event.type = AndroidControllerEvent.POV;
					controller.pov |= 0x00000010;
					event.povDirection = controller.getPov(0);
				} else if (keyCode == KeyEvent.KEYCODE_DPAD_RIGHT) {
					event.type = AndroidControllerEvent.POV;
					controller.pov |= 0x00000100;
					event.povDirection = controller.getPov(0);
				} else if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT) {
					event.type = AndroidControllerEvent.POV;
					controller.pov |= 0x00001000;
					event.povDirection = controller.getPov(0);
				} else {
					event.type = AndroidControllerEvent.BUTTON_DOWN;
					event.code = keyCode;
				}
			} else {
				if (keyCode == KeyEvent.KEYCODE_DPAD_UP) {
					event.type = AndroidControllerEvent.POV;
					controller.pov &= 0x00001110;
					event.povDirection = controller.getPov(0);
				} else if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN) {
					event.type = AndroidControllerEvent.POV;
					controller.pov &= 0x00001101;
					event.povDirection = controller.getPov(0);
				} else if (keyCode == KeyEvent.KEYCODE_DPAD_RIGHT) {
					event.type = AndroidControllerEvent.POV;
					controller.pov &= 0x00001011;
					event.povDirection = controller.getPov(0);
				} else if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT) {
					event.type = AndroidControllerEvent.POV;
					controller.pov &= 0x00000111;
					event.povDirection = controller.getPov(0);
				} else {
					event.type = AndroidControllerEvent.BUTTON_UP;
					event.code = keyCode;
				}
			}
			eventQueue.add(event);
		}
		if (keyCode == KeyEvent.KEYCODE_BACK && !Gdx.input.isCatchBackKey()) {
			return false;
		}
		return true;
	} else {
		return false;
	}
}

源代码20 项目： BambooPlayer 文件： MediaController.java


@Override
public boolean dispatchKeyEvent(KeyEvent event) {
	int keyCode = event.getKeyCode();
	int keyMode = event.getAction();

	if (keyMode == KeyEvent.ACTION_DOWN) {
		switch (keyCode) {
		case KeyEvent.KEYCODE_VOLUME_MUTE:
			return super.dispatchKeyEvent(event);
		case KeyEvent.KEYCODE_VOLUME_UP:
		case KeyEvent.KEYCODE_VOLUME_DOWN:
			mVolume = mAM.getStreamVolume(AudioManager.STREAM_MUSIC);
			int step = keyCode == KeyEvent.KEYCODE_VOLUME_UP ? 1 : -1;
			setVolume(mVolume + step);
			mHandler.removeMessages(MSG_HIDE_OPERATION_VOLLUM);
			mHandler.sendEmptyMessageDelayed(MSG_HIDE_OPERATION_VOLLUM, 500);
			return true;
		}

		if (isLocked() && keyCode != KeyEvent.KEYCODE_BACK) {
			show();
			return true;
		}

		if (event.getRepeatCount() == 0
				&& (keyCode == KeyEvent.KEYCODE_HEADSETHOOK
						|| keyCode == KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE || keyCode == KeyEvent.KEYCODE_SPACE)) {
			doPauseResume();
			show(DEFAULT_TIME_OUT);
			return true;
		} else if (keyCode == KeyEvent.KEYCODE_MEDIA_STOP) {
			if (mPlayer.isPlaying()) {
				mPlayer.pause();
				updatePausePlay();
			}
			return true;
		} else if (keyCode == KeyEvent.KEYCODE_BACK) {
			pressbacktime++;
			if (pressbacktime > 1) {
				release();
			}
			mPlayer.stop(pressbacktime);
			return true;
		} else {
			show(DEFAULT_TIME_OUT);
		}
		return super.dispatchKeyEvent(event);
	} else {
		return super.dispatchKeyEvent(event);
	}
}

方法所在类

android.view.KeyEvent