SharePreferences应用跨进程获取数据

Java代码

    private static final String SHARED_FILE_NAME = "client_ini";
    private static final String SHARED_FILE_BOOLEAN_VALUE = "key_test";
    
    SharedPreferences share = getSharedPreferences(SHARED_FILE_NAME, Context.MODE_WORLD_READABLE);  
                    boolean preBooleanValue = share.getBoolean(SHARED_FILE_BOOLEAN_VALUE, false);// 得到之前的值  
                    // 更改share里的值  
                    share.edit().putBoolean(SHARED_FILE_BOOLEAN_VALUE, !preBooleanValue).commit();// 改变值  
                    boolean afterBooleanValue = share.getBoolean(SHARED_FILE_BOOLEAN_VALUE, false);// 得到之前的值  
                    mValueText.setText(afterBooleanValue + "");  


 而程序b则在onresume的时候获取程序a中数据：
Java代码

    private static final String TARGET_PACKAGE_NAME = "com.example.sharedataa";// 目标数据程序的包名，  
    /**
         * 根据目标程序的包名来获取其程序的上下文
         * @return
         * @throws NameNotFoundException
         */  
        private Context getTargetContext() throws NameNotFoundException {  
            return createPackageContext(TARGET_PACKAGE_NAME, Context.CONTEXT_IGNORE_SECURITY);  
        }  

 
Java代码

    /**
         * Context.MODE_MULTI_PROCESS一定要添加，按理说只要Context.MODE_WORLD_READABLE 即可
         * <p>
         * 但是，如果只有Context.MODE_WORLD_READABLE 的话，即使另一个程序改变了值，这个程序得到的值永远都是第一次获取的值
         * <p>
         * 不会随着其他程序改变而改变
         */  
        @Override  
        protected void onResume() {  
            super.onResume();  
            try {  
                SharedPreferences share = getTargetContext().getSharedPreferences(SHARED_FILE_NAME,  
                        Context.MODE_WORLD_READABLE | Context.MODE_MULTI_PROCESS);  
                boolean afterBooleanValue = share.getBoolean(SHARED_FILE_BOOLEAN_VALUE, false);// 得到之前的值  
                mBooleanValueText.setText(afterBooleanValue + "");  
            } catch (NameNotFoundException e) {  
                e.printStackTrace();  
                mBooleanValueText.setText("木有找到该包名");  
            }  
        }