Question

我有一个自定义操作栏和附加到它的onclick，它在后台运行，出于某种奇怪的原因我的应用程序强制关闭。我在doinbackground中进行网络操作下面附有代码

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    setContentView(R.layout.enroll);


final ActionBar mActionBar = getActionBar();
mActionBar.setDisplayShowHomeEnabled(false);
mActionBar.setDisplayShowTitleEnabled(false);
LayoutInflater mInflater = LayoutInflater.from(enroll.this);

final View mCustomView = mInflater.inflate(R.layout.custom_actionbar_enroll, null);
TextView mTitleTextView = (TextView) mCustomView.findViewById(R.id.title_text1);
mTitleTextView.setText("True Tracer");
String fontPath = "fonts/stasmic_.ttf";
Typeface tf = Typeface.createFromAsset(getAssets(), fontPath);
mTitleTextView.setTypeface(tf);

final ImageButton imageButton = (ImageButton) mCustomView
    .findViewById(R.id.imageButton1);
mActionBar.setCustomView(mCustomView);
mActionBar.setDisplayShowCustomEnabled(true);
tpass=(TextView)findViewById(R.id.tip);
otp1=(EditText)findViewById(R.id.otp1);

pref = getApplicationContext().getSharedPreferences("MyPref", 0);
String samp=pref.getString("mynumber", null);
tpass.setText("Self authentication SMS sent \n with activation code to  "+samp);
imageButton.setOnClickListener(new OnClickListener() {

public void onClick(View v) {

    backend runner = new backend();
    runner.execute();
    }
});
    }


class backend extends AsyncTask<String, Void, Result>
{

    @Override
    protected Result doInBackground(String... params) {
do something();
}
}

Answer 1

在您点击时，请像这样调用异步任务

           new backend().execute();

Answer 2

为什么你声明你的asynctask需要String类型的参数，但是当你调用execute时你不发送任何参数？此外，doInBackground返回Result类型的对象。你在onPostExecute中对该对象做了什么？要知道问题是什么，有两件事是很重要的：异常以及你在AsyncTask中做了什么。

自定义操作栏onclick不适用于异步任务 - android

2 个答案: