Android 获取静态上下文（Application），键盘按键值(keycode,ascii码)

public class MyApplication extends Application{ 

    private static Context context; 

    public void onCreate(){ 
        super.onCreate(); 
        MyApplication.context = getApplicationContext(); 
    } 

    public static Context getAppContext() { 
        return MyApplication.context; 
    } 
} 

字母和数字键的键码值(keyCode)
按键	键码	按键	键码	按键	键码	按键	键码
A	65	J	74	S	83	1	49
B	66	K	75	T	84	2	50
C	67	L	76	U	85	3	51
D