The Android Development Tutorials blog contains Basic as well as Advanced android tutorials.Go to Android Development Tutorials to get list of all Android Tutorials.
ProgresBar
ProgressBar is a Visual indicator of progress in some operation. Displays a bar to the user representing how far the operation has progressed; the application can change the amount of progress (modifying the length of the bar) as it moves forward. There is also a secondary progress displayable on a progress bar which is useful for displaying intermediate progress, such as the buffer level during a streaming playback progress bar.
Progress Bar Example
In this example I have shown the progress while downloading a file.We can also customize a progress bar to make it more beautiful
.Read How To Customize Progress Bar
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Customizing Progress Bar
To learn Basic of Android Animation go to Android Animation Basics
main..xml
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android">
<TextView
android:id="@+id/textView2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
android:gravity="center_horizontal"
android:textSize="25dp"
android:text="Progress Bar Example" />
<Button
android:id="@+id/button1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:onClick="startProgressDialog"
android:text="Start Downloading File" />
</LinearLayout>
Note: To add a progress bar to a layout file, you can use the
<ProgressBar> element.
By default, the progress bar is a spinning wheel (an indeterminate indicator). To change to a
horizontal progress bar, apply the Widget.ProgressBar.Horizontal style, like so:
ProgressBarActivity.java
public class ProgressBarActivity extends Activity
{
Button btnStartProgress;
ProgressDialog progressBar;
private int progressBarStatus = 0;
private Handler progressBarHandler = new Handler();
private long fileSize = 0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
public void startProgressDialog(View V)
{
// prepare for a progress bar dialog
progressBar = new ProgressDialog(V.getContext());
progressBar.setCancelable(true);
progressBar.setMessage("Downloading File...");
progressBar.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progressBar.setProgress(0);
progressBar.setMax(100);
progressBar.show();
//reset progress bar status
progressBarStatus = 0;
//reset filesize
fileSize = 0;
new Thread(new Runnable() {
public void run() {
while (progressBarStatus < 100) {
// process some tasks
progressBarStatus = fileDownloadStatus();
// sleep 1 second to show the progress
try {
Thread.sleep(1000);
}
catch (InterruptedException e) {
e.printStackTrace();
}
// Update the progress bar
progressBarHandler.post(new Runnable() {
public void run() {
progressBar.setProgress(progressBarStatus);
}
});
}
// when, file is downloaded 100%,
if (progressBarStatus >= 100) {
// sleep 2 seconds, so that you can see the 100% of file download
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
// close the progress bar dialog
progressBar.dismiss();
}
}
}).start();
}
//method returns the % of file downloaded
public int fileDownloadStatus()
{
while (fileSize <= 1000000) {
fileSize++;
if (fileSize == 100000) {
return 10;
} else if (fileSize == 200000) {
return 20;
} else if (fileSize == 300000) {
return 30;
} else if (fileSize == 400000) {
return 40;
} else if (fileSize == 500000) {
return 50;
} else if (fileSize == 600000) {
return 60;
}
// write your code here
}
return 100;
}
We can also customize a progress bar to make it more beautiful
.Read How To Customize Progress Bar
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Beginning With Android
Android : Introduction Configuring Eclipse for Android Development
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Working With Layouts Working With Views
Understanding Layouts in Android Using Buttons and EditText in Android
Working with Linear Layout (With Example) Using CheckBoxes in Android
Nested Linear Layout (With Example) Using AutoCompleteTextView in Android Grid View
Relative Layout In Android ListView
Table Layout Android ProgressBar
Frame Layout(With Example) Customizing ProgressBar
Absolute Layout Customizing Radio Buttons
Grid Layout Customizing Checkboxes In Android
Android Components Dialogs In Android
Activity In Android Working With Alert Dialog
Activity Life Cycle Adding Radio Buttons In Dialog
Starting Activity For Result Adding Check Boxes In Dialog
Sending Data from One Activity to Other in Android Creating Customized Dialogs in Android
Returning Result from Activity Creating Dialog To Collect User Input
Android : Service DatePicker and TimePickerDialog
BroadcastReceiver Using TimePickerDialog and DatePickerDialog In android
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Creating Option Menu Populating ListView With DataBase
Creating Context Menu In Android Populating ListView with ArrayList
ListView with Custom Adapter
Toast Working With SMS
Customizing Toast In Android How to Send SMS in Android
Customizing the Display Time of Toast How To Receive SMS
Customizing Toast At Runtime Accessing Inbox In Android
Adding Image in Toast
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TelephonyManager Storage: Storing Data In Android
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Reading and Writing files to Internal Stoarage
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How to Forward an Incoming Call In Android Creating Table In Android
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Sending Email In Android
Opening a webpage In Browser
How to Access PhoneBook In Android
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