ProcessBar进度条

Posted 2020-09-01 楚天千里

1.进度条关键属性

2.进度条的常用方法

progress = (ProgressBar) findViewById(R.id.horiz);

（1）获取第一进度条：progress.getProgress();

（2）获取第二进度条：progress.getSecondaryProgress();

（3）获取最大进度条：progress.getMax();

（4）增加进度条刻度：progress.incrementProgressBy(10);

   减少进度条刻度，就把参数改为负数

课程Demo

public class MainActivity extends Activity implements OnClickListener {
   private ProgressBar progress;
   private Button add;
   private Button reduce;
   private Button reset;
   private TextView text;
    private ProgressDialog prodialog;
   private Button show;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      // 启用窗口特征，启用带进度和不带进度的进度条
      requestWindowFeature(Window.FEATURE_PROGRESS);
      requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
      //加载布局文件
      setContentView(R.layout.main);
      // 显示两种进度条
      setProgressBarVisibility(true);//带进度
      setProgressBarIndeterminateVisibility(false);//不带进度
      // Max=10000
      setProgress(9999);
      init();
   }
   private void init() {
      // TODO Auto-generated method stub
      progress = (ProgressBar) findViewById(R.id.horiz);
      add = (Button) findViewById(R.id.add);
      reduce = (Button) findViewById(R.id.reduce);
      reset = (Button) findViewById(R.id.reset);
      text = (TextView) findViewById(R.id.text);
      show=(Button) findViewById(R.id.show);
      show.setOnClickListener(this);
      // 获取第一进度条的进度
      int first = progress.getProgress();
      // 获取第二进度条的进度
      int second = progress.getSecondaryProgress();
      // 获取进度条的最大进度
      int max = progress.getMax();
      text.setText("第一进度百分比：" + (int) (first / (float) max * 100)
            + "% 第二进度百分比：" + (int) (second / (float) max * 100) + "%");
      add.setOnClickListener(this);
      reduce.setOnClickListener(this);
      reset.setOnClickListener(this);
   }
   @Override
   public void onClick(View v) {
      // TODO Auto-generated method stub
      switch (v.getId()) {
      case R.id.add: {
         // 增加第一进度和第二进度10个刻度
         progress.incrementProgressBy(10);
         progress.incrementSecondaryProgressBy(10);

         break;
      }
      case R.id.reduce: {
         // 减少第一进度和第二进度10个刻度
         progress.incrementProgressBy(-10);
         progress.incrementSecondaryProgressBy(-10);
         break;
      }
      case R.id.reset: {
         progress.setProgress(50);
         progress.setSecondaryProgress(80);
         break;
      }
      case R.id.show:
      {
         /**
          * 页面显示风格
          */
         //新建ProgressDialog对象
         prodialog=new ProgressDialog(MainActivity.this);
         //设置显示风格
         prodialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
         //设置标题
         prodialog.setTitle("嗨咯");
         //设置对话框里的文字信息
         prodialog.setMessage("欢迎大家");
         //设置图标
         prodialog.setIcon(R.drawable.ic_launcher);
         
         /**
          * 设定关于ProgressBar的一些属性
          */
         //设定最大进度
         prodialog.setMax(100);
         //设定初始化已经增长到的进度
         prodialog.incrementProgressBy(50);
         //进度条是明确显示进度的
         prodialog.setIndeterminate(false);
         
         /**
          * 设定一个确定按钮
          */
         
         prodialog.setButton(DialogInterface.BUTTON_POSITIVE, "确定", new DialogInterface.OnClickListener() {
            
            @Override
            public void onClick(DialogInterface dialog, int which) {
               // TODO Auto-generated method stub
               Toast.makeText(MainActivity.this, "欢迎大家", Toast.LENGTH_SHORT).show();
            }
         });
         //是否可以通过返回按钮退出对话框
         prodialog.setCancelable(true);
         //显示ProgressDialog
         prodialog.show();
         
         break;
      }
      }
      text.setText("第一进度百分比："+ (int) (progress.getProgress() / (float) progress.getMax() * 100)+ "% 第二进度百分比："
       + (int) (progress.getSecondaryProgress()/ (float) progress.getMax() * 100) + "%");
      
   }
}
SeekBar基本属性与上面相同
SeekBar的监听器为OnSeekBarChangeListener
但是自定义SeekBar时,需属性android:thumb="@drawable/my_thumb"
附上my_thumb的配置信息
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/select" android:state_pressed="true" android:state_window_focused="true"/>
<item android:drawable="@drawable/select" android:state_focused="true" android:state_window_focused="true"/>
<item android:drawable="@drawable/select" android:state_selected="true" android:state_window_focused="true"/>
<item android:drawable="@drawable/normal"/>
</selector>