ProgressBar元件應用

1.UI的xml檔

<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginRight="82dp"

        android:layout_x="34dp"

        android:layout_y="89dp"

        android:text="Start" />

    <Button

        android:id="@+id/button2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_x="156dp"

        android:layout_y="89dp"

        android:text="Start2" />

    <TextView

        android:id="@+id/text"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginLeft="14dp"

        android:layout_marginTop="43dp"

        android:layout_x="68dp"

        android:layout_y="37dp"

        android:text="準備顯示進度對話框"

        android:textSize="20sp" />

</AbsoluteLayout>

2.主程式程式碼

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

import android.app.ProgressDialog;

public class MainActivity extends Activity {

TextView tv;

Button btn, btn2;

ProgressDialog progresslog;

ProgressDialog progresslog2;

MyProgress myp;

MyProgress2 myp2;

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

tv = (TextView) this.findViewById(R.id.text);

btn = (Button) this.findViewById(R.id.button1);

btn2 = (Button) this.findViewById(R.id.button2);

btn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View arg0) {

tv.setText("按返回鍵取消進度對話框");

progresslog = new ProgressDialog(MainActivity.this, 1);

progresslog.setMessage("Loading...");

progresslog.setProgressStyle(ProgressDialog.STYLE_SPINNER);

progresslog.show();

myp = new MyProgress(handler);

myp.start();

}

});

btn2.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View arg0) {

tv.setText("按返回鍵取消進度對話框");

progresslog2 = new ProgressDialog(MainActivity.this, 1);

progresslog2.setMessage("Loading...");

progresslog2.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

progresslog2.show();

myp2 = new MyProgress2(handler2);

myp2.start();

}

});

}

final Handler handler = new Handler() {

public void handleMessage(Message msg) {

int count = msg.arg1;

if (count == MyProgress.count) {

new MyProgress().setSate(MyProgress.sate, 0);

tv.setText("進度對話框完成");

}

}

};

final Handler handler2 = new Handler() {

public void handleMessage(Message msg) {

progresslog2.incrementProgressBy(10);

if (progresslog2.getProgress() == progresslog2.getMax()) {

tv.setText("進度對話框完成");

}

}

};

class MyProgress extends Thread {

private int total = 0;

private boolean limited = true;

public final static int count = 50;

public final static boolean sate = false;

Handler han;

MyProgress() {

}

MyProgress(Handler h) {

han = h;

}

public void run() {

while (limited) {

total++;

if (total == count) {

progresslog.dismiss();

}

Message msg = new Message();

msg.arg1 = total;

han.sendMessage(msg);

try {

Thread.sleep(100);

} catch (InterruptedException e) {

progresslog.dismiss();

}

}

}

public void setSate(boolean sate, int total) {

limited = sate;

this.total = total;

}

}

class MyProgress2 extends Thread {

Handler han2;

MyProgress2(Handler h) {

han2 = h;

}

public void run() {

while (progresslog2.getProgress() <= progresslog2.getMax()) {

Message msg = new Message();

han2.sendMessage(msg);

try {

Thread.sleep(1000);

} catch (InterruptedException e) {

progresslog2.dismiss();

}

if (progresslog2.getProgress() == progresslog2.getMax()) {

progresslog2.dismiss();

}

}

}

}

}