ProcessBar简单应用

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1.ProcessBar的使用方法：

Xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="ProcessBar" />
    <!--就是水平方式展示的进度条，水平的-->
    <ProgressBar
        android:id="@+id/first_bar"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:visibility="gone"/>
    <!--默认风格的进度条，就是圆圈-->
    <ProgressBar
        android:id="@+id/second_bar"
        style="?android:attr/progressBarStyle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="gone"/>

    <Button
        android:id="@+id/my_bt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="begin"/>
</LinearLayout>

 

测试类：

 

public class MainActivity extends Activity {

    private ProgressBar firstBar = null;
    private ProgressBar secondBar = null;
    private Button myButton = null;
    int i = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.proessbar);

        firstBar = (ProgressBar)findViewById(R.id.first_bar);
        secondBar = (ProgressBar)findViewById(R.id.second_bar);
        myButton = (Button)findViewById(R.id.my_bt);

        myButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(i == 0){
                    //设置进度条处于可见状态
                    firstBar.setVisibility(View.VISIBLE);
                    secondBar.setVisibility(View.VISIBLE);
                }else if(i < 100){
                    firstBar.setProgress(i);
                    firstBar.setSecondaryProgress(i+10);
//                    不用设置，设置显示不出来
//                    secondBar.setProgress(i);
                }else{
//                    设置进度条处于不可见状态
                    firstBar.setVisibility(View.INVISIBLE);
                    secondBar.setVisibility(View.INVISIBLE);
                }
                i += 10;
            }
        });
    }
}