Android按键Input KeyEvent

àì夳堔傛蜴生んèń 2023-06-25 06:06 26阅读 0赞

使用android的Input输入系统，模拟按键音量加减。

### input命令 ###

adb调试命令：

\#音量+  
adb shell input keyevent 24  
\#音量-  
adb shell input keyevent 25

### Instrumentation实现按键功能 ###

代码实现，调用接口simulateKey()

public static void simulateKey(final int KeyCode) { 
        new Thread() { 
            @Override
            public void run() { 
                try { 
                    Instrumentation inst = new Instrumentation();
                    inst.sendKeyDownUpSync(KeyCode);
                } catch (Exception e) { 
                    Log.e("hello", e.toString());
                }
            }
    
        }.start();
    }

\#音量+  
simulateKey(KeyEvent.KEYCODE\_VOLUME\_UP);

\#音量-  
simulateKey(KeyEvent.KEYCODE\_VOLUME\_DOWN);

### input命令实现按键功能 ###

代码实现，调用接口simulateKeyByCommand()

public static void simulateKeyByCommand(final int KeyCode){ 
        try{ 
            String keyCommand = "input keyevent " +KeyCode;
            Runtime runtime = Runtime.getRuntime();
            Process proc = runtime.exec(keyCommand);
        } catch(IOException e){ 
            //Log.e(TAG, e.toString());
        }
    }

\#音量+  
simulateKeyByCommand(KeyEvent.KEYCODE\_VOLUME\_UP);

\#音量-  
simulateKeyByCommand(KeyEvent.KEYCODE\_VOLUME\_DOWN);

### 关于Key值的定义 ###

frameworks\\base\\core\\java\\android\\view\\KeyEvent.java  
列举几个：

/** Key code constant: '*' key. */
        public static final int KEYCODE_STAR            = 17;
        /** Key code constant: '#' key. */
        public static final int KEYCODE_POUND           = 18;
        /** Key code constant: Directional Pad Up key. * May also be synthesized from trackball motions. */
        public static final int KEYCODE_DPAD_UP         = 19;
        /** Key code constant: Directional Pad Down key. * May also be synthesized from trackball motions. */
        public static final int KEYCODE_DPAD_DOWN       = 20;
        /** Key code constant: Directional Pad Left key. * May also be synthesized from trackball motions. */
        public static final int KEYCODE_DPAD_LEFT       = 21;
        /** Key code constant: Directional Pad Right key. * May also be synthesized from trackball motions. */
        public static final int KEYCODE_DPAD_RIGHT      = 22;
        /** Key code constant: Directional Pad Center key. * May also be synthesized from trackball motions. */
        public static final int KEYCODE_DPAD_CENTER     = 23;
        /** Key code constant: Volume Up key. * Adjusts the speaker volume up. */
        public static final int KEYCODE_VOLUME_UP       = 24;
        /** Key code constant: Volume Down key. * Adjusts the speaker volume down. */
        public static final int KEYCODE_VOLUME_DOWN     = 25;
        /** Key code constant: Power key. */
        public static final int KEYCODE_POWER           = 26;
        /** Key code constant: Camera key. * Used to launch a camera application or take pictures. */
        public static final int KEYCODE_CAMERA          = 27;
        /** Key code constant: Clear key. */
        public static final int KEYCODE_CLEAR           = 28;
        /** Key code constant: 'A' key. */
        public static final int KEYCODE_A               = 29;

参考文献：  
[https://blog.csdn.net/u011913612/article/details/51916761][https_blog.csdn.net_u011913612_article_details_51916761]

[https_blog.csdn.net_u011913612_article_details_51916761]: https://blog.csdn.net/u011913612/article/details/51916761