Question

在此代码中，我想使用环progressdialog来打开并加载每个活动。

我的代码效果不好。在我的代码中，进度条关闭，活动在很长一段时间后打开。

我想在progressdialog中添加onListItemClick，请帮助我

public class Listsoti extends ListActivity {

String[] str = {"1","2","3","4","5","6","7","8","9","10","11","12","13","14"};
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.listview);

    TextView list = (TextView) findViewById(R.id.hamid);
    PersianReshape.ReshapeTextview(list, "hamid1.ttf", Listsoti.this);
    setListAdapter(new MyAdapter(this,
            android.R.layout.simple_list_item_1,R.id.textView1, str));
}

private class MyAdapter extends ArrayAdapter<String>{

    public MyAdapter(Context context, int resource, int textViewResourceId,
            String[] strings) {
        super(context, resource, textViewResourceId, strings);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View row = inflater.inflate(R.layout.listsoti, parent, false);
        String[] items = getResources().getStringArray(R.array.contor);

        ImageView iv = (ImageView) row.findViewById(R.id.imageView1);
        TextView tv = (TextView) row.findViewById(R.id.textView1);
        PersianReshape.ReshapeTextview(tv,"hamid1.ttf", Listsoti.this);
        tv.setText(items[position]);

        switch (position) {
        case 0:
           iv.setImageResource(R.drawable.dozdeh);
           break;
        case 1:
            iv.setImageResource(R.drawable.download);
            break;
        default:
            break;
        }
        return row;
    }
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    Toast.makeText(this, str[position] +" your choose", Toast.LENGTH_LONG).show();
    switch (position) {
    case 0:
        startActivity(new Intent(Listsoti.this, Play.class));

        break;
    case 1:
        final Dialog dialog = new Dialog(this);

        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE); 
        dialog.setContentView(R.layout.progressdialog);
        dialog.show();
        startActivity(new Intent(Listsoti.this, Play.class));


        break;
    default:
        break;
        }
}

编辑，加载班级

public class LoadingScreenActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
System.out.println("LoadingScreenActivity  screen started");
setContentView(R.layout.loading_screen);
Spinner s = (Spinner) findViewById(R.id.mainSpinner1);
s.setVisibility(View.VISIBLE);
//do work if needed and then launch new activity
Intent mainIntent = new Intent(LoadingScreenActivity.this,Play.class); 
    LoadingScreenActivity.this.startActivity(mainIntent); 
    LoadingScreenActivity.this.finish(); 
}

}

Answer 1

您可以使用此示例，这是LoadingActivity，您每次需要多次显示ProgressDialog'. You can customize it by passing activity name through Intent which is gonna be launched next. So you will be able to reuse this Activity`时都会创建该示例。请检查一下。

创建LoadingScreen布局文件

在这里，您可以创建一个仅显示加载文本的屏幕和一个进度条loading_screen.xml

<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"    android:gravity="center" android:orientation="vertical"
  android:layout_height="fill_parent" android:background="#E5E5E5">

   <TextView android:text="Please wait while your data gets loaded..."
        android:layout_width="wrap_content" android:layout_height="wrap_content"
        android:textColor="#000000">
   </TextView>
  <ProgressBar android:id="@+id/mainSpinner1" android:layout_gravity="center" 
            android:layout_width="wrap_content" android:layout_height="wrap_content"
            android:indeterminate="true" 
            style="?android:attr/progressBarStyleInverse">
   </ProgressBar>

</LinearLayout>

创建一个LoadingScreen类文件

并且在LoadingScreenActivity.class中，您通常会覆盖onCreate：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    System.out.println("LoadingScreenActivity  screen started");
    setContentView(R.layout.loading_screen);

    Spinner s = findViewById(R.id.mainSpinner1);
    s.setVisibility(View.VISIBLE);

    //do work if needed and then launch new activity
    Intent mainIntent = new Intent(LoadingScreenActivity.this,ProfileData.class); 
    LoadingScreenActivity.this.startActivity(mainIntent); 
    LoadingScreenActivity.this.finish(); 
}

这将在您的自定义任务完成后加载下一个活动。 3.从onListItemClick事件

创建启动加载屏幕活动的意图

protected void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);

    Intent intent = new Intent(ProfileList.this, LoadingScreenActivity.class);
    startActivity(intent);
}

<强>更新

要通过点击按钮启动LoadingActivity的情况，您只需将此代码添加到当前活动中：

yourButton.setOnCLickListener(new OnCLickListener(){
   @Override
   public void onCLick(View view){
      Intent intent = new Intent(this, LoadingScreenActivity.class);
            startActivity(intent);
   }
}

在方法Play.class

onCreate()

Dialog dialog = new Dialog(this);

dialog.requestWindowFeature(Window.FEATURE_NO_TITLE); 
dialog.setContentView(R.layout.progressdialog);
dialog.show();

然后初始化加载文件，加载完成后，调用此方法dialog.dismiss();并继续工作。

开始活动时的进度条

1 个答案: