I want a progress circle instead of progress dialog

问题

I want to show a progress Circle in my app while loading data. I have an activity and moving from one activity to another I am parsing some xml data so for the time being until the parsing is completed I want to show a circular loading effect.

回答1:

You can use an indeterminate ProgressBar for the circular loading effect. Here is how you do it in XML:

<ProgressBar android:indeterminate="true"
            android:layout_width="50dp" android:layout_height="50dp"
            android:id="@+id/marker_progress" style="?android:attr/progressBarStyle"
            android:layout_gravity="center_vertical|center_horizontal"/>

You can change the height and width to be what you want. When you are done loading, you can change it's visibility to View.INVISIBLE or View.GONE

回答2:

You need to create animation xml file in res/anim folder and call startAnimation in your ImageView when you are loading data and stopAnimation when you stop loading data. And set loading image to ImageView, for example:

This id code for circle animation xml file

<?xml version="1.0" encoding="UTF-8"?>
<rotate
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromDegrees="0"
    android:toDegrees="360"
    android:pivotX="50%"
    android:pivotY="50%"
    android:repeatCount="infinite"
    android:duration="1200" 
    android:interpolator="@android:anim/linear_interpolator" />

回答3:

Insert this beetween two View tags

<ProgressBar android:id="@+id/loading_spinner"
        style="?android:progressBarStyleLarge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center" />

回答4:

Why not use the progressbar UI

myProgressDialog = ProgressDialog.show(ListingPage.this,"Please Wait", "Loading Date", true);

dan

回答5:

Use AsyncTask for loading and parsing:

 /**
   * Background task that fetched the content from server and parses the content.
   */
  private class BackgroundLoadingTask extends AsyncTask<InputStream, Void, Boolean> {

    @Override
    protected void onPreExecute() {
      // show the progress bar
      Activity.this.requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
      Activity.this.requestWindowFeature(Window.PROGRESS_VISIBILITY_ON);
    }

    @Override
    protected Boolean doInBackground(InputStream... params) {

      // try to load XML from HTTP server and parse

      return true;
    }


    @Override
    protected void onPostExecute(Boolean parsingError) {
      // hide the progress bar
      Activity.this.requestWindowFeature(Window.PROGRESS_VISIBILITY_OFF);


    }
  }

回答6:

Just as you would the progress dialog, use an animation instead with async task and just make it visible on prexecution and hide it again on post.

回答7:

To expand a bit on trgraglia's answer, you could create an indeterminate (behavior: cycle) progress bar and set the visibility to false. During AsyncTask preExecute(), make it visible, and during AsyncTask onPostExecute(), turn it back to invisible (provided you are staying on the same activity or w/e case you may need). This eliminates the need to create an animation.

来源：https://stackoverflow.com/questions/5259506/i-want-a-progress-circle-instead-of-progress-dialog

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android

progress