1
當在設置的開發人員選項進度對話框上選擇「不保持活動」時不會退出。 實際上,我正在顯示Progerss欄,用於初始化應用程序,當我將活動A轉到活動B並且然後進入活動A時,初始化完成後,進度欄不會解除。 下面是我的代碼,當在設置中不保留活動時,進度對話框不會消失
第一個活動
package com.example.donotkeepactivitiesalive;
import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity {
public static final int MESSAGE_PROGRESS_BAR_INITIALIZING = 1;
private Dialog m_cObjDialog;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
System.out.println(getClass().getName() + "before InitializeEnvironment >>>>>>");
new InitializeEnvironment().execute();
System.out.println(getClass().getName() + "after InitializeEnvironment >>>>>>");
Button lb = (Button) findViewById(R.id.button1);
lb.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent lIntent = new Intent(MainActivity.this, SecondActivity.class);
startActivity(lIntent);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
protected Dialog onCreateDialog(int id) {
m_cObjDialog = new ProgressDialog(this);
m_cObjDialog.setTitle("Initializing");
((ProgressDialog) m_cObjDialog).setMessage("Initializing the Application");
m_cObjDialog.setCancelable(false);
return m_cObjDialog;
}
class InitializeEnvironment extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
System.out.println(getClass().getName() + "onPreExecute >>>>>>");
super.onPreExecute();
showDialog(MESSAGE_PROGRESS_BAR_INITIALIZING);
}
@Override
protected String doInBackground(String... aurl) {
System.out.println(getClass().getName() + " doInBackground >>>>>>");
return null;
}
@Override
protected void onPostExecute(String unused) {
dismissDialog(MESSAGE_PROGRESS_BAR_INITIALIZING);
System.out.println(getClass().getName() + " onPostExecute >>>>>>");
}
}
}
次活動
package com.example.donotkeepactivitiesalive;
import android.app.Activity;
import android.os.Bundle;
public class SecondActivity extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
有什麼辦法來追蹤這個問題和工作,即使「不保留活動」已啓用
你得到任何錯誤... ??? – Developer 2013-03-21 12:46:49
Log Cat沒有錯誤 – 2013-03-21 12:54:36
什麼是InitializeData();方法...??? – Developer 2013-03-21 12:56:32