如何在程式碼加上ProgressBar

昨天跟老師討論完之後

老師建議我們把CountDown Timer改成ProgressBar

而其餘需求就跟昨天一樣

(TextView點下會出現ProgressBar並倒數)

以下是我的步驟

[main]

新增ProgressBar並在裡面寫上

android:id="@+id/ProgressBar01"

android:layout_height="wrap_content"

android:layout_width="200px"

android:layout_gravity="center_horizontal"

android:layout_marginTop="20sp"

style="?android:attr/progressBarStyleHorizontal"

並在其餘想要點下的TextView都加上

android:onClick="start"

[主程式]

一開始先宣告

private ProgressBar progressBar;

private int nowProgressStatus=0;

public Thread thread;

接著在OnCreate裡面加上

progressBar = (ProgressBar)findViewById(R.id.ProgressBar01);

progressBar.setVisibility(View.INVISIBLE);(預設隱藏)

final Handler handler = new Handler();

final Runnable callback1 = new Runnable(){

@Override

public void run() {

// TODO Auto-generated method stub

}

};

thread = new Thread(){

public void run(){

while (nowProgressStatus <100){

try{

Thread.sleep(6000);

}catch (InterruptedException e){

e.printStackTrace();

}

nowProgressStatus+=1;

handler.post(new Runnable() {

@Override

public void run() {

// TODO Auto-generated method stub

progressBar.setProgress(nowProgressStatus);

}

});

}

}

};

最後在你想要OnClick的TextView裡面加上

progressBar.setVisibility(View.VISIBLE);(點下後出現)

thread.start();

完成!!