ProgressDialog用法
2012-02-06 08:36:47| 分类： Android | 标签：android progressdialgo |字号大中小 订阅
1.新建Android项目 ProgressDialog 在包andorid.huada下建文件ProgressDialogActivity.java
2.ProgressDialogActivity.java代码如下
package android.huada;
import android.app.Activity; import android.app.ProgressDialog; import android.os.Bundle; import android.os.Handler; import android.os.Message;
public class ProgressDialogActivity extends Activity { /** Called when the activity is first created. */ ProgressDialog progressDialog; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); progress("下载数据中", "请稍等......"); } public void progress(String title,String message){ progressDialog = new ProgressDialog(this); updateThread thread= new updateThread(); progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); progressDialog.setMessage(message); progressDialog.setTitle(title); progressDialog.setProgress(0); progressDialog.setMax(100); progressDialog.show(); thread.start();
} Handler handler = new Handler(){
@Override public void handleMessage(Message msg) { // TODO Auto-generated method stub if(msg.what>=100){ progressDialog.cancel(); } progressDialog.setProgress(msg.what); super.handleMessage(msg); } }; class updateThread extends Thread{ public void run(){ handler.sendEmptyMessage(0); try { updateThread.sleep(1000); handler.sendEmptyMessage(10); updateThread.sleep(1000); handler.sendEmptyMessage(20); updateThread.sleep(1000); handler.sendEmptyMessage(30); updateThread.sleep(1000); handler.sendEmptyMessage(40); updateThread.sleep(1000); handler.sendEmptyMessage(50); updateThread.sleep(1000); handler.sendEmptyMessage(60); updateThread.sleep(1000); handler.sendEmptyMessage(70); updateThread.sleep(1000); handler.sendEmptyMessage(80); updateThread.sleep(1000); handler.sendEmptyMessage(100); updateThread.sleep(1000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }; }
3.配置文件main.xml代码如下
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> </LinearLayout>
4.此项目是通过线程及时修改UI，运行效果图如下