Android ProgressBar Progress Bar-android Learning Journey (31)
Last Update:2015-06-02
Source: Internet
Author: User
<span id="Label3"></p>ProgressBar Introduction<p><p>ProgressBar is a very common UI used to show progress to complex operations and provide better user Response. Use setprogress () Incrementprogressby () to set progress and display progress to increase or decrease, positive numbers to increase, negative numbers to Decrease.</p></p>The style of ProgressBar<p><p><br></p></p>ProgressBar<p><p></p></p>Code Sample layout Code<pre class="prettyprint"><code class=" hljs xml"><span class="hljs-tag"><<span class="hljs-title"><span class="hljs-title">LinearLayout</span></span> <span class="hljs-attribute"><span class="hljs-attribute">xmlns:android</span></span>=<span class="hljs-value"><span class="hljs-value">"http://schemas.android.com/apk/res/android"</span></span> <span class="hljs-attribute"><span class="hljs-attribute">Xmlns:tools</span></span>=<span class="hljs-value"><span class="hljs-value">"http://schemas.android.com/tools"</span></span> <span class="hljs-attribute"><span class="hljs-attribute">Android:layout_width</span></span>=<span class="hljs-value"><span class="hljs-value">"match_parent"</span></span> <span class="hljs-attribute"><span class="hljs-attribute">Android:layout_height</span></span>=<span class="hljs-value"><span class="hljs-value">"match_parent"</span></span> <span class="hljs-attribute"><span class="hljs-attribute">Android:paddingleft</span></span>=<span class="hljs-value"><span class="hljs-value">"@dimen/activity_horizontal_margin"</span></span> <span class="hljs-attribute"><span class="hljs-attribute">Android:paddingright</span></span>=<span class="hljs-value"><span class="hljs-value">"@dimen/activity_horizontal_margin"</span></span> <span class="hljs-attribute"><span class="hljs-attribute">Android:paddingtop</span></span>=<span class="hljs-value"><span class="hljs-value">"@dimen/activity_vertical_margin"</span></span> <span class="hljs-attribute"><span class="hljs-attribute">Android:paddingbottom</span></span>=<span class="hljs-value"><span class="hljs-value">"@dimen/activity_vertical_margin"</span></span> <span class="hljs-attribute"><span class="hljs-attribute">Tools:context</span></span>=<span class="hljs-value"><span class="hljs-value">". Mainactivity "</span></span> <span class="hljs-attribute"><span class="hljs-attribute">android:orientation</span></span>=<span class="hljs-value"><span class="hljs-value">"vertical"</span></span>></span> <span class="hljs-tag"><span class="hljs-tag"><<span class="hljs-title">linearlayout</span><span class="hljs-attribute">android:layout_width</span>=<span class="hljs-value">"fill_parent"</span><span class="hljs-attribute">android:layout_height </span>=<span class="hljs-value">"wrap_content"</span><span class="hljs-attribute">android:orientation</span>=<span class="hljs-value">"horizontal"</span>> </span></span> <span class="hljs-tag"><span class="hljs-tag"><<span class="hljs-title">ProgressBar</span><span class="hljs-attribute">android:layout_width</span>=<span class="hljs-value">"wrap_content"</span><span class="hljs-attribute">android:layout_ Height</span>=<span class="hljs-value">"wrap_content"</span><span class="hljs-attribute">style</span>=<span class="hljs-value">"@android: style/widget.progressbar.small"</span>/ > </span></span> <span class="hljs-tag"><span class="hljs-tag"><<span class="hljs-title">ProgressBar</span><span class="hljs-attribute">android:layout_width</span>=<span class="hljs-value">"wrap_content"</span><span class="hljs-attribute">android:layout_height </span>=<span class="hljs-value">"wrap_content"</span> /> </span></span> <span class="hljs-tag"><span class="hljs-tag"><<span class="hljs-title">ProgressBar</span><span class="hljs-attribute">android:layout_width</span>=<span class="hljs-value">"wrap_content"</span><span class="hljs-attribute">android:layout_height </span>=<span class="hljs-value">"wrap_content"</span><span class="hljs-attribute">style</span>=<span class="hljs-value">"@android: style/widget.progressbar.large"</span>/> </span></span> <span class="hljs-tag"><span class="hljs-tag"></<span class="hljs-title">linearlayout</span>></span></span> <span class="hljs-tag"><span class="hljs-tag"><<span class="hljs-title">textview </span> <span class="hljs-attribute">android:layout _width </span> =<span class="hljs-value"> "wrap_content" </span> <span class="hljs-attribute">android:layout_height </span> =<span class="hljs-value"> "wrap_content" </span> <span class="hljs-attribute">android:text </span> =<span class="hljs-value" and "below is the horizontal progress bar" < span>/> </span></span></span> <span class="hljs-tag"><span class="hljs-tag"><<span class="hljs-title">progressbar </span> <span class="hljs-attribute">android: Layout_width </span> =<span class="hljs-value"> "fill_parent" </span> <span class="hljs-attribute">android:layout_ Height </span> =<span class="hljs-value"> "wrap_content" </span> <span class="hljs-attribute">android:id </span> =< Span class= "hljs-value" > "@+id/bar" </span> <span class="hljs-attribute">android:max </span> =<span class="hljs-value ">" "</span> <span class=" hljs-attribute ">style </span> =<span class=" hljs-value ">" @android: style/ Widget.ProgressBar.Horizontal "</span>/> </span> <span class="hljs-tag"><span class="hljs-tag"><<span class="hljs-title">ProgressBar</span><span class="hljs-attribute">android:layout_width</span>=<span class="hljs-value">"fill_parent"</span><span class="hljs-attribute">android:layout_height</span> =<span class="hljs-value">"wrap_content"</span><span class="hljs-attribute">android:id</span>= "<span class="hljs-value">@+id/bar2"</span><span class="hljs-attribute">android:max</span>=<span class="hljs-value">"</span> <span class="hljs-attribute"> Android:progressdrawable</span>=<span class="hljs-value">"@drawable/bar"</span><span class="hljs-attribute">style</span>=<span class="hljs-value">"@android: style/ Widget.ProgressBar.Horizontal "</span>/> </span></span><span class="hljs-tag"><span class="hljs-tag"></<span class="hljs-title">linearlayout</span>></span></span></code></pre><pre class="prettyprint"><code class=" hljs xml"><span class="hljs-pi"><span class="hljs-pi"><?xml version= "1.0" encoding= "UTF-8"?></span></span> <span class="hljs-tag"><span class="hljs-tag"><<span class="hljs-title">layer-list</span> <span class="hljs-attribute">xmlns:android</span>=<span class="hljs-value">"http://schemas.android.com/apk/res/android"</span>> </span></span> <span class="hljs-tag"><span class="hljs-tag"><<span class="hljs-title">item</span><span class="hljs-attribute">android:id</span>=<span class="hljs-value">"@android: id/background"</span><span class="hljs-attribute">android:drawable</span>=<span class="hljs-value">"#f00" </span>/> </span></span> <span class="hljs-tag"><span class="hljs-tag"><<span class="hljs-title">item</span><span class="hljs-attribute">android:id</span>=<span class="hljs-value">"@android: id/progress"</span><span class="hljs-attribute">android:drawable</span>= <span class="hljs-value">"@drawable/ic_launcher"</span>/> </span></span> <span class="hljs-tag"><span class="hljs-tag"></<span class="hljs-title">layer-list</span>></span></span></code></pre>Principal Class Code<pre class="prettyprint"><code class=" hljs java"><span class="hljs-keyword"><span class="hljs-keyword"></span> package</span>peng.liu.testview;<span class="hljs-keyword"><span class="hljs-keyword">Import</span></span>android.app.Activity;<span class="hljs-keyword"><span class="hljs-keyword">Import</span></span>android.os.Bundle;<span class="hljs-keyword"><span class="hljs-keyword">Import</span></span>android.os.Handler;<span class="hljs-keyword"><span class="hljs-keyword">Import</span></span>android.os.Message;<span class="hljs-keyword"><span class="hljs-keyword">Import</span></span>android.widget.ProgressBar;<span class="hljs-keyword"><span class="hljs-keyword"></span> public</span> <span class="hljs-class"><span class="hljs-class"> <span class="hljs-keyword">class</span> <span class="hljs-title">mainactivity</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">Activity</span> {</span></span> <span class="hljs-keyword"><span class="hljs-keyword">Private</span></span> <span class="hljs-keyword"><span class="hljs-keyword">int</span></span>[] data =<span class="hljs-keyword"><span class="hljs-keyword">New</span></span> <span class="hljs-keyword"><span class="hljs-keyword">int</span></span>[<span class="hljs-number"><span class="hljs-number"></span> -</span>];<span class="hljs-keyword"><span class="hljs-keyword">int</span></span>HasData =<span class="hljs-number"><span class="hljs-number">0</span></span>;<span class="hljs-keyword"><span class="hljs-keyword">int</span></span>Status =<span class="hljs-number"><span class="hljs-number">0</span></span>; ProgressBar bar,bar2; Handler Handler =<span class="hljs-keyword"><span class="hljs-keyword">New</span></span>Handler () {<span class="hljs-annotation"><span class="hljs-annotation">@Override</span></span> <span class="hljs-keyword"><span class="hljs-keyword"></span> public</span> <span class="hljs-keyword"><span class="hljs-keyword">void</span></span> <span class="hljs-title"><span class="hljs-title">Handlemessage</span></span>(Message Msg) {<span class="hljs-keyword"><span class="hljs-keyword">if</span></span>(msg.what = =<span class="hljs-number"><span class="hljs-number">0x123</span></span>) {bar.setprogress (status); Bar2.setprogress (status); } } };<span class="hljs-annotation"><span class="hljs-annotation">@Override</span></span> <span class="hljs-keyword"><span class="hljs-keyword">protected</span></span> <span class="hljs-keyword"><span class="hljs-keyword">void</span></span> <span class="hljs-title"><span class="hljs-title">onCreate</span></span>(Bundle Savedinstancestate) {<span class="hljs-keyword"><span class="hljs-keyword">Super</span></span>. onCreate (savedinstancestate); Bar = (ProgressBar) Findviewbyid (r.id.bar); BAR2 = (ProgressBar) Findviewbyid (r.id.bar2);<span class="hljs-keyword"><span class="hljs-keyword">New</span></span>Thread () {<span class="hljs-annotation"><span class="hljs-annotation">@Override</span></span> <span class="hljs-keyword"><span class="hljs-keyword"></span> public</span> <span class="hljs-keyword"><span class="hljs-keyword">void</span></span> <span class="hljs-title"><span class="hljs-title">Run</span></span>() {<span class="hljs-keyword"><span class="hljs-keyword">if</span></span>(status <<span class="hljs-number"><span class="hljs-number"></span> -</span>) {status = DoWork (); Handler.sendemptymessage (<span class="hljs-number"><span class="hljs-number">0x123</span></span>); } } }; }<span class="hljs-keyword"><span class="hljs-keyword"></span> public</span> <span class="hljs-keyword"><span class="hljs-keyword">int</span></span> <span class="hljs-title"><span class="hljs-title">DoWork</span></span>() {data[hasdata++] = (<span class="hljs-keyword"><span class="hljs-keyword">int</span></span>) (math.random () *<span class="hljs-number"><span class="hljs-number"></span> -</span>);<span class="hljs-keyword"><span class="hljs-keyword">Try</span></span>{thread.sleep (<span class="hljs-number"><span class="hljs-number"></span> -</span>); }<span class="hljs-keyword"><span class="hljs-keyword">Catch</span></span>(Exception E) {e.printstacktrace (); }<span class="hljs-keyword"><span class="hljs-keyword">return</span></span>hasData; }}</code></pre><p><p></p></p> <p><p>Android ProgressBar Progress Bar-android Learning Journey (31)</p></p></span>
