OnActivityResult适用于2种不同的活动

时间:2015-09-21 11:08:22

标签: android android-intent android-activity onactivityresult

我正在尝试在相同的活动中初始化/打开NFC和BT模块。 我需要在继续执行任务之前启用它们。

我确实理解OnResultActivity是异步的,所以我想弄清楚实现它的最佳方法是什么?

以下是大部分代码:

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        initBT();
        initNFC();

        Intent nextIntent;      
        if(SaveSharedPreference.getUserName(MainActivity.this).length() == 0)
        {
            nextIntent = new Intent(MainActivity.this, LoginActivity.class);
        }
        else
        {
            nextIntent = new Intent(MainActivity.this, MainMenuActivity.class);
        }   
        startActivity(nextIntent);
        finish();
    }


    private void initBT() {
        if(BTModule.GetInstance().initBT().equals(Constants.eBluetoothStatus.BT_DISABLED)){
            Intent enableBtIntent = new Intent(BTModule.GetAdapter().ACTION_REQUEST_ENABLE);
            startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
        }
    }

    private void initNFC(){

        mNFCState = NFCModule.initNFC(this);
        if(mNFCState == eNFCStatus.NFC_NOT_SUPPORTED){
            Toast.makeText(this, "NFC is not suppoeted for this device", Toast.LENGTH_LONG).show();
        }
        else if(mNFCState == eNFCStatus.NFC_DISABLED){
            Intent nfcIntent;
            if(android.os.Build.VERSION.SDK_INT >= 16){
                nfcIntent = new Intent(android.provider.Settings.ACTION_NFC_SETTINGS);  
            }
            else{
            nfcIntent = new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS);
            }
            startActivity(nfcIntent);
            Toast.makeText(this, "Please enable NFC", Toast.LENGTH_LONG);
        }
        else{
            Toast.makeText(this, "NFC is up and running", Toast.LENGTH_LONG).show();
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode == eBluetoothStatus.BT_OK.ordinal()){
            Toast.makeText(this, "BT is up and running", Toast.LENGTH_LONG).show();
            return;
        }

    }

}

因为我是新手,如果我错了,请随时纠正我:)

谢谢!

1 个答案:

答案 0 :(得分:0)

initNFC 方法中使用 startActivityForResult 代替 startActivity 。还要定义2个布尔变量,如 isNfcEnabled isBtEnabled 。在 onActivityResult 方法中检查这些布尔值。如果两者都启用,请执行任何操作。