MainActivity.java文件代码
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package com.example.android_pickers2;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.RatingBar;
import android.widget.RatingBar.OnRatingBarChangeListener;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.Toast;
public class MainActivity extends Activity {
Button button ;
ProgressBar bar;
SeekBar seekBar;
RatingBar ratingBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) this.findViewById(R.id.button1);
bar = (ProgressBar) this.findViewById(R.id.progressBar1);
bar.setMax(100);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
MyTask task = new MyTask();
task.execute();
}
});
//SeekBar的使用
seekBar = (SeekBar) this.findViewById(R.id.seekBar1);
seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
Toast.makeText(MainActivity.this, "->>"+progress, 1).show();
System.out.println("-->"+progress);
// TODO Auto-generated method stub
}
});
//RatingBar的使用
ratingBar = (RatingBar) this.findViewById(R.id.ratingBar1);
ratingBar.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {
@Override
public void onRatingChanged(RatingBar ratingBar, float rating,
boolean fromUser) {
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this, "->"+rating, 1).show();
}
});
}
/*
* 定义一个类继承AsyncTask类，动态改变ProgressBar
*/
class MyTask extends AsyncTask{
@Override
protected void onProgressUpdate(Integer... values) {
// TODO Auto-generated method stub
super.onProgressUpdate(values);
//更新bar
bar.setProgress(values[0]+20);
}
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
int i=1;
while(i<=100){
try {
Thread.sleep(100);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
publishProgress(i);
i++;
}
return null;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
} activity_main.xml代码:
