Mobile Application Development Practical 13
Question 1
Write a program to display following output.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Download File" />
<ProgressBar
android:id="@+id/progressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:visibility="invisible" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginBottom="30dp"
android:layout_marginLeft="20dp"
android:textSize="16dp"
android:text="" />
</FrameLayout>
</androidx.constraintlayout.widget.ConstraintLayout>MainActivity.java
package com.example.practical13;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
TextView tv;
Button b;
ProgressBar pb;
Handler h=new Handler();
int status=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv=findViewById(R.id.textView);
b=findViewById(R.id.button);
pb=findViewById(R.id.progressBar);
class ProcessThread extends Thread
{
@Override
public void run() {
while(status<100)
{
try {
sleep(200);
status++;
}
catch (Exception e){
e.printStackTrace();
}
h.post(new Runnable() {
@Override
public void run() {
pb.setProgress(status);
}
});
}
h.post(new Runnable() {
@Override
public void run() {
tv.setText("Download complete");
}
});
}
}
View.OnClickListener cl=new View.OnClickListener() {
@Override
public void onClick(View view) {
b.setVisibility(View.INVISIBLE);
pb.setVisibility(View.VISIBLE);
ProcessThread pth=new ProcessThread();
pth.start();
tv.setText("File Downloading");
}
};
b.setOnClickListener(cl);
}
}Output
