android加載進度條 – Android移動開發技術文章_手機開發 Android移動開發教學課程

package xiaohang.zhimeng;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.ProgressBar;

public class Activity01 extends Activity {

//聲明ProgressBar對象
private ProgressBar xh_ProgressBar;
private ProgressBar xh_ProgressBar2;
private Button xh_Button;
protected static final int GUI_STOP_NOTIFIER = 0x108;
protected static final int GUI_THREADING_NOTIFIER = 0x109;
public int intCounter = 0;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//設置窗口模式,因為需要顯示進度條在標題欄
//  requestWindowFeature(Window.FEATURE_PROGRESS);
//  setProgressBarVisibility(true);
setContentView(R.layout.main);

//得到ProgressBar
xh_ProgressBar = (ProgressBar) findViewById(R.id.ProgressBar01);
xh_ProgressBar2 = (ProgressBar) findViewById(R.id.ProgressBar02);
xh_Button = (Button) findViewById(R.id.Button01);

//設置進度條 不為 不確定模式
xh_ProgressBar.setIndeterminate(false);
xh_ProgressBar2.setIndeterminate(false);

//當按鈕按下時開始執行
xh_Button.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
//設置ProgressBar為可見狀態
xh_ProgressBar.setVisibility(View.VISIBLE);
xh_ProgressBar2.setVisibility(View.VISIBLE);
//設置ProgressBar的最大值
xh_ProgressBar.setMax(100);
//設置ProgressBar當前值
xh_ProgressBar.setProgress(0);
xh_ProgressBar2.setProgress(0);

//通過線程來改變ProgressBar的值
new Thread(new Runnable() {
@Override
public void run() {
for (int i = 0; i < 10; i++) {
try {
//設置進度值
intCounter = (i + 1) * 20;
//睡眠1000毫秒
Thread.sleep(1000);

if (i == 4) {
Message m = new Message();

m.what = Activity01.GUI_STOP_NOTIFIER;
Activity01.this.myMessageHandler
.sendMessage(m);
break;
} else {
Message m = new Message();
m.what = Activity01.GUI_THREADING_NOTIFIER;
Activity01.this.myMessageHandler
.sendMessage(m);
}

} catch (Exception e) {
e.printStackTrace();
}
}
}

}).start();
}

});
}

Handler myMessageHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
//ProgressBar已經是最大值
case Activity01.GUI_STOP_NOTIFIER:
xh_ProgressBar.setVisibility(View.GONE);
xh_ProgressBar2.setVisibility(View.GONE);
Thread.currentThread().interrupted();
break;
case Activity01.GUI_THREADING_NOTIFIER:
if (!Thread.currentThread().isInterrupted()) {
//改變ProgressBar的當前值
xh_ProgressBar.setProgress(intCounter);
xh_ProgressBar2.setProgress(intCounter);

//設置標題欄中前景的一個進度條進度值
setProgress(intCounter * 100);
}
break;
}
super.handleMessage(msg);
}
};
}

XML 文件
<?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"
    />

<ProgressBar
android:id="@+id/ProgressBar01"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:visibility="gone"
/>

<ProgressBar
android:id="@+id/ProgressBar02"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:max="100"
android:progress="50"
android:secondaryProgress="70"
android:visibility="gone"
/>

<Button
android:id="@+id/Button01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="開始"/>

</LinearLayout>

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