【移動應用開發(fā)技術】Android UI控件之ProgressBar進度條的實現(xiàn)方法

【移動應用開發(fā)技術】AndroidUI控件之ProgressBar進度條的實現(xiàn)方法

<LinearLayout

xmlns:android="/apk/res/android"

xmlns:tools="/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="簡單進度條的展示"

android:layout_gravity="center_horizontal"/>

<ProgressBar

android:id="@+id/progressBar1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center_horizontal"

/>

<ProgressBar

android:id="@+id/progressBar2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center_horizontal"/>

<ProgressBar

android:id="@+id/progressBar3"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center_horizontal"

android:max="100"

android:minWidth="180dip"

android:minHeight="40dip"

/>

</LinearLayout>package

com.kiritor.ui_progressbar;

import

android.os.Bundle;

import

android.app.Activity;

import

android.view.Menu;

import

android.widget.ProgressBar;

public

class

MainActivity

extends

Activity

implements

Runnable

{

private

ProgressBar

bar

=

null;

private

Thread

thread

=

null;//

聲明一個線程

private

boolean

stateChange;

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

bar

=

(ProgressBar)

findViewById(R.gressBar3);

thread

=

new

Thread(this);

thread.start();

}

@Override

public

boolean

onCreateOptionsMenu(Menu

menu)

{

//

Inflate

the

menu;

this

adds

items

to

the

action

bar

if

it

is

present.

getMenuInflater().inflate(R.menu.main,

menu);

return

true;

}

@Override

public

void

run()

{

while

(true)

{

int

current

=

bar.getProgress();//

得到當前進度值

int

currentMax

=

bar.getMax();//

得到進度條的最大進度值

//int

secCurrent

=

bar.getSecondaryProgress();//

得到底層當前進度值

//

以下代碼實現(xiàn)進度值越來越大，越來越小的一個動態(tài)效果

if

(stateChange

==

false)

{

if

(current

>=

currentMax)

{

stateChange

=

true;

}

else

{

//

設置進度值

bar.setProgress(current

+

1);

//

設置底層進度值

bar.setSecondaryProgress(current

+

1);

}

}

else

{

if

(current

<=

0)

{

stateChange

=

false;

}

else

{

bar.setProgress(current

-

1);

bar.setSecondaryProgress(current

-

1);

}

}

try

{

Thread.sleep(50);