ProgressBar学习

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main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <SeekBar        android:id="@+id/progressBar1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:max="100"         android:progress="20"        android:secondaryProgress="40" />    <Button         android:id="@+id/add"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/add"/>    <Button         android:id="@+id/reduce"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/reduce"/>    <Button         android:id="@+id/reset"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/reset"/>    <TextView         android:id="@+id/text"        android:layout_width="wrap_content"        android:layout_height="wrap_content"/>    <Button         android:id="@+id/show"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/show"/></LinearLayout>

MainActivity.java

package com.example.progressbardemo;import android.os.Bundle;import android.app.Activity;import android.app.ProgressDialog;import android.content.DialogInterface;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ProgressBar;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity implements OnClickListener{private ProgressBar pb;private Button add;private Button reduce;private Button reset;private TextView text;private Button show;private ProgressDialog pd;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);pb = (ProgressBar) findViewById(R.id.progressBar1);add = (Button) findViewById(R.id.add);reduce = (Button) findViewById(R.id.reduce);reset = (Button) findViewById(R.id.reset);text = (TextView) findViewById(R.id.text); show = (Button) findViewById(R.id.show);int firstPb = pb.getProgress();  int secondPb = pb.getSecondaryProgress();int maxPb = pb.getMax();text.setText("第一进度百分比："+(int)(firstPb/(float)maxPb*100)+"%;第二进度百分比："+(int)(secondPb/(float)maxPb*100)+"%");add.setOnClickListener(this);reduce.setOnClickListener(this);reset.setOnClickListener(this);show.setOnClickListener(this);}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.add://第一进度和第二进度各增加10pb.incrementProgressBy(10);pb.incrementSecondaryProgressBy(10);break;case R.id.reduce://第一进度和第二进度各减少10pb.incrementProgressBy(-10);pb.incrementSecondaryProgressBy(-10);break;case R.id.reset:pb.setProgress(20);pb.setSecondaryProgress(40);break;case R.id.show:/** * 页面显示风格 *///新建ProgressDialog对象pd = new ProgressDialog(MainActivity.this);//设置显示风格pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);//设置标题pd.setTitle("胖子");//设置对话框里的文字信息pd.setMessage("奔跑吧，胖子！！！");//设置图标pd.setIcon(R.drawable.ic_launcher);/** * 设定关于ProgressBar的一些属性 *///设定最大进度pd.setMax(100);//设定初始化已经增长到的进度pd.incrementProgressBy(20);//进度条是明确显示进度的pd.setIndeterminate(false);/** * 设定一个确定按钮 */pd.setButton(DialogInterface.BUTTON_POSITIVE, "确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubToast.makeText(MainActivity.this, "奔跑吧，胖子！！！", Toast.LENGTH_SHORT).show();}});//是否可以通过返回按钮退出对话框pd.setCancelable(true);//显示ProgressDialogpd.show();break;default:break;}}}

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