單個值輸入：

private void inputKey(int keycode){
        try
        {
            String keyCommand = "input keyevent " + keycode;
            Runtime runtime = Runtime.getRuntime();
            Process proc = runtime.exec(keyCommand);
        }
        catch (IOException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

private void inputKey2(final int keyCode) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    // 建立一個Instrumentation物件
                    Instrumentation inst = new Instrumentation();
                    // 呼叫inst物件的按鍵模擬方法
                    inst.sendCharacterSync(keyCode);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }).start();
    }
 

多個值同時輸入：

private void inputKey(String keycode){
        try
        {
            String keyCommand = "input text " + keycode;
            Runtime runtime = Runtime.getRuntime();
            Process proc = runtime.exec(keyCommand);
        }
        catch (IOException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
 

private void inputKey2(final String keyCode) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    // 建立一個Instrumentation物件
                    Instrumentation inst = new Instrumentation();
                    // 呼叫inst物件的按鍵模擬方法
                    inst.sendStringSync(keyCode);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }).start();
    }

KeyCode值：

KEYCODE_UNKNOWN=0; 

KEYCODE_SOFT_LEFT=1; 

KEYCODE_SOFT_RIGHT=2; 

KEYCODE_HOME=3; 

KEYCODE_BACK=4; 

KEYCODE_CALL=5; 

KEYCODE_ENDCALL=6; 

KEYCODE_0=7; 

KEYCODE_1=8; 

KEYCODE_2=9; 

KEYCODE_3=10; 

KEYCODE_4=11; 

KEYCODE_5=12; 

KEYCODE_6=13; 

KEYCODE_7=14; 

KEYCODE_8=15; 

KEYCODE_9=16; 

KEYCODE_STAR=17; 

KEYCODE_POUND=18; 

KEYCODE_DPAD_UP=19; 

KEYCODE_DPAD_DOWN=20; 

KEYCODE_DPAD_LEFT=21; 

KEYCODE_DPAD_RIGHT=22; 

KEYCODE_DPAD_CENTER=23; 

KEYCODE_VOLUME_UP=24; 

KEYCODE_VOLUME_DOWN=25; 

KEYCODE_POWER=26; 

KEYCODE_CAMERA=27; 

KEYCODE_CLEAR=28; 

KEYCODE_A=29; 

KEYCODE_B=30; 

KEYCODE_C=31; 

KEYCODE_D=32; 

KEYCODE_E=33; 

KEYCODE_F=34; 

KEYCODE_G=35; 

KEYCODE_H=36; 

KEYCODE_I=37; 

KEYCODE_J=38; 

KEYCODE_K=39; 

KEYCODE_L=40; 

KEYCODE_M=41; 

KEYCODE_N=42; 

KEYCODE_O=43; 

KEYCODE_P=44; 

KEYCODE_Q=45; 

KEYCODE_R=46; 

KEYCODE_S=47; 

KEYCODE_T=48; 

KEYCODE_U=49; 

KEYCODE_V=50; 

KEYCODE_W=51; 

KEYCODE_X=52; 

KEYCODE_Y=53; 

KEYCODE_Z=54; 

KEYCODE_COMMA=55; 

KEYCODE_PERIOD=56; 

KEYCODE_ALT_LEFT=57; 

KEYCODE_ALT_RIGHT=58; 

KEYCODE_SHIFT_LEFT=59; 

KEYCODE_SHIFT_RIGHT=60; 

KEYCODE_TAB=61; 

KEYCODE_SPACE=62; 

KEYCODE_SYM=63; 

KEYCODE_EXPLORER=64; 

KEYCODE_ENVELOPE=65; 

KEYCODE_ENTER=66; 

KEYCODE_DEL=67; 

KEYCODE_GRAVE=68; 

KEYCODE_MINUS=69; 

KEYCODE_EQUALS=70; 

KEYCODE_LEFT_BRACKET=71; 

KEYCODE_RIGHT_BRACKET=72; 

KEYCODE_BACKSLASH=73; 

KEYCODE_SEMICOLON=74; 

KEYCODE_APOSTROPHE=75; 

KEYCODE_SLASH=76; 

KEYCODE_AT=77; 

KEYCODE_NUM=78; 

KEYCODE_HEADSETHOOK=79; 

KEYCODE_FOCUS=80;//*Camera*focus 

KEYCODE_PLUS=81; 

KEYCODE_MENU=82; 

KEYCODE_NOTIFICATION=83; 

KEYCODE_SEARCH=84; 

KEYCODE_MEDIA_PLAY_PAUSE=85; 

KEYCODE_MEDIA_STOP=86; 

KEYCODE_MEDIA_NEXT=87; 

KEYCODE_MEDIA_PREVIOUS=88; 

KEYCODE_MEDIA_REWIND=89; 

KEYCODE_MEDIA_FAST_FORWARD=90; 

KEYCODE_MUTE=91; 

參考：

https://www.cnblogs.com/travellife/p/4107434.html

http://blog.csdn.net/aminfo/article/details/7785975