ProgressBar:
ProgressBar is used to show the progress of an operation.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
Some More Good Android Topics
Customizing Toast In Android
Showing Toast for Longer Time
Customizing Checkboxes In Android
Customizing Progress Bar
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
Advance Android Topics
Customizing Toast In Android
Showing Toast for Longer Time
Customizing the Display Time of Toast
Using TimePickerDialog and DatePickerDialog In android
Animating A Button In Android
Populating ListView With DataBase
Customizing Checkboxes In Android
Increasin Size of Checkboxes
Android ProgressBar
Designing For Different Screen Sizes
Handling Keyboard Events
More Android Topics:
Android : Introduction
Eclipse Setup for Android Development
Configuring Eclipse for Android DevelopmentBegging With Android
Creating Your First Android ProjectUnderstanding Android Manifest File of your android app
Working With Layouts
Understanding Layouts in AndroidWorking with Linear Layout (With Example)
Nested Linear Layout (With Example)
Table Layout
Frame Layout(With Example)
Absolute Layout
Grid Layout
Activity
Activity In AndroidActivity Life Cycle
Starting Activity For Result
Sending Data from One Activity to Other in Android
Returning Result from Activity
Working With Views
Using Buttons and EditText in AndroidUsing CheckBoxes in Android
Using AutoCompleteTextView in Android
Grid View
Toast
Customizing Toast In AndroidCustomizing the Display Time of Toast
Customizing Toast At Runtime
Adding Image in Toast
Showing Toast for Longer Time
Dialogs In Android
Working With Alert DialogAdding Radio Buttons In Dialog
Adding Check Boxes In Dialog
Creating Customized Dialogs in Android
Adding EditText in Dialog
Creating Dialog To Collect User Input
DatePicker and TimePickerDialog
Using TimePickerDialog and DatePickerDialog In androidWorking With SMS
How to Send SMS in AndroidHow To Receive SMS
Accessing Inbox In Android
ListView:
Populating ListView With DataBaseMenus In Android
Creating Option MenuCreating Context Menu In Android
TelephonyManager
Using Telephony Manager In AndroidWorking With Incoming Calls
How To Handle Incoming Calls in AndroidHow to Forward an Incoming Call In Android
CALL States In Android
Miscellaneous
Notifications In AndroidHow To Vibrate The Android Phone
Sending Email In Android
Opening a webpage In Browser
How to Access PhoneBook In Android
Prompt User Input with an AlertDialog
Storage: Storing Data In Android
Shared Prefferences In Android
SharedPreferences In AndroidFiles: File Handling In Android
Reading and Writing files to Internal StoarageReading and Writing files to SD Card
DataBase : Working With Database
Working With Database in AndroidCreating Table In Android
Inserting, Deleting and Updating Records In Table in Android
How to Create DataBase in Android
Accessing Inbox In Android
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