Android 6.0中，除了危險(xiǎn)權(quán)限不再在安裝后授予，還有兩個(gè)特殊權(quán)限：

• 設(shè)置懸浮窗： SYSTEM_ALERT_WINDOW
• 修改系統(tǒng)設(shè)置：WRITE_SETTINGS

修改系統(tǒng)設(shè)置權(quán)限的授權(quán) WRITE_SETTINGS，與其他權(quán)限不同
而是使用startActivityForResult，啟動(dòng)系統(tǒng)設(shè)置的授權(quán)界面來申請(qǐng)

    /**
     * 申請(qǐng)權(quán)限
     */
    private void requestWriteSettings()
    {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
        {
            //大于等于23 請(qǐng)求權(quán)限
            if ( !Settings.System.canWrite(getApplicationContext()))
            {
                Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS);
                intent.setData(Uri.parse("package:" + getPackageName()));
                startActivityForResult(intent, REQUEST_CODE_WRITE_SETTINGS );
            }
        }else{
            //小于23直接設(shè)置
        }
    }

獲取授權(quán)結(jié)果:

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == REQUEST_CODE_WRITE_SETTINGS)
        {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
            {
                  //Settings.System.canWrite方法檢測授權(quán)結(jié)果
                if (Settings.System.canWrite(getApplicationContext()))
                {
                    T.show("獲取了權(quán)限");
                }else{
                    T.show("您拒絕了權(quán)限");
                }
            }
        }

    }

微信截圖_20180920215924.png