UI控件----ProgressBar进度条 实例总结

ProgressBar提供了可以向用户展示当前任务的进度。

完成效果如下，单击增加/减少进度可以调节进度。

完成步骤一：layout的xml文件中activity_main.xml完成代码

<LinearLayout 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:orientation="vertical"    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" >    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="小圆形进度条" />    <ProgressBar        style="?android:attr/progressBarStyleSmallTitle"        android:layout_width="wrap_content"        android:layout_height="wrap_content" >    </ProgressBar>    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="中圆形进度条" >    </TextView>    <ProgressBar        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="大圆形进度条" >    </TextView>    <ProgressBar        style="?android:attr/progressBarStyleLarge"        android:layout_width="wrap_content"        android:layout_height="wrap_content" >    </ProgressBar>    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="水平进度条" >    </TextView>    <ProgressBar        style="?android:attr/progressBarStyleHorizontal"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:max="100"        android:progress="30" >    </ProgressBar>    <ProgressBar        android:id="@+id/progressbar"        style="?android:attr/progressBarStyleHorizontal"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:layout_marginTop="20dp"        android:max="100"        android:progress="30"        android:secondaryProgress="60" >    </ProgressBar>    <LinearLayout        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:orientation="horizontal" >        <Button            android:id="@+id/button1"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_marginTop="20dp"            android:text="增加进度" >        </Button>        <Button            android:id="@+id/button2"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_marginTop="20dp"            android:text="减小进度" >        </Button>    </LinearLayout></LinearLayout>

完成步骤二：mainactivity.java中完成代码：

package com.example.android_programbar;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.view.View;import android.view.Window;import android.widget.Button;import android.widget.ProgressBar;import android.view.View.OnClickListener;public class MainActivity extends Activity implements OnClickListener{private ProgressBar progressBar;private Button button1, button2;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);//setContentView(R.layout.activity_main);//设置窗口有刻度requestWindowFeature(Window.FEATURE_PROGRESS);requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);setContentView(R.layout.activity_main);progressBar = (ProgressBar) this.findViewById(R.id.progressbar);setProgressBarVisibility(true);setProgressBarIndeterminate(true);setProgress(3500);button1 = (Button) this.findViewById(R.id.button1);button2 = (Button) this.findViewById(R.id.button2);button1.setOnClickListener( this);button2.setOnClickListener( this);}public void onClick(View v) {switch (v.getId()) {case R.id.button1:progressBar.setProgress((int) (progressBar.getProgress() * 1.2));progressBar.setSecondaryProgress((int) (progressBar.getSecondaryProgress() * 1.2));break;case R.id.button2:progressBar.setProgress((int) (progressBar.getProgress() * 0.6));progressBar.setSecondaryProgress((int) (progressBar.getSecondaryProgress() * 0.6));break;}}}