activity_main.xml
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/rl"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="10dp"
tools:context=".MainActivity"
android:background="#F0F1F2"
>
<TextView
android:id="@+id/tv"
android:layout_width="150dp"
android:layout_height="wrap_content"
android:fontFamily="sans-serif-condensed"
android:textColor="#676a6b"
android:gravity="center"
android:textAlignment="gravity"
/>
<ProgressBar
android:id="@+id/pb"
android:layout_width="150dp"
android:layout_height="150dp"
style="@android:style/Widget.ProgressBar.Horizontal"
android:progressDrawable="@drawable/progressbar_states"
android:layout_below="@id/tv"
/>
<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Start Operation"
android:layout_below="@id/pb"
android:layout_marginTop="10dp"
/>
</RelativeLayout>
res/drawable/progressbar_states.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@android:id/background">
<rotate
android:fromDegrees="90"
android:toDegrees="90"
>
<shape
android:shape="line">
<stroke
android:width="5dp"
android:color="#d0d4d7"
/>
</shape>
</rotate>
</item>
<item android:id="@android:id/progress">
<clip android:clipOrientation="vertical" android:gravity="bottom">
<rotate
android:fromDegrees="90"
android:toDegrees="90"
>
<shape
android:shape="line">
<stroke
android:width="5dp"
android:color="#ff0500"
/>
</shape>
</rotate>
</clip>
</item>
</layer-list>
MainActivity.java
package com.cfsuman.me.androidcodesnippets;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.ProgressBar;
import android.os.Handler;
public class MainActivity extends Activity {
private int progressStatus = 0;
private Handler handler = new Handler();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Get the widgets reference from XML layout
final RelativeLayout rl = (RelativeLayout) findViewById(R.id.rl);
final Button btn = (Button) findViewById(R.id.btn);
final TextView tv = (TextView) findViewById(R.id.tv);
final ProgressBar pb = (ProgressBar) findViewById(R.id.pb);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Set the progress status zero on each button click
progressStatus = 0;
// Start the lengthy operation in a background thread
new Thread(new Runnable() {
@Override
public void run() {
while(progressStatus < 100){
// Update the progress status
progressStatus +=1;
// Try to sleep the thread for 20 milliseconds
try{
Thread.sleep(20);
}catch(InterruptedException e){
e.printStackTrace();
}
// Update the progress bar
handler.post(new Runnable() {
@Override
public void run() {
pb.setProgress(progressStatus);
// Show the progress on TextView
tv.setText(progressStatus+"");
// If task execution completed
if(progressStatus == 100){
// Set a message of completion
tv.setText("Operation completed.");
}
}
});
}
}
}).start(); // Start the operation
}
});
}
}





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