ProgressBar

来源：互联网发布：康奈尔大学学费知乎编辑：程序博客网时间：2024/05/18 00:15

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"     android:orientation="vertical">    <Button        android:id="@+id/btn"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/btn" />    <ProgressBar         android:id="@+id/progressbar"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:visibility="invisible"/>    <Button        android:id="@+id/btnprogressbar"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/btnprogressbar" />    <!--小  -->    <ProgressBar         android:layout_width="wrap_content"        android:layout_height="wrap_content"        style="@android:style/Widget.ProgressBar.Small"/>    <!--中  -->    <ProgressBar         android:layout_width="wrap_content"        android:layout_height="wrap_content"        style="@android:style/Widget.ProgressBar.Inverse"/>    <!--大  -->    <ProgressBar         android:layout_width="wrap_content"        android:layout_height="wrap_content"        style="@android:style/Widget.ProgressBar.Large"/>    <!--水平进度条  -->    <ProgressBar         android:id="@+id/pd2"        android:max="100"        android:layout_width="match_parent"        android:layout_height="wrap_content"        style="@android:style/Widget.ProgressBar.Horizontal"/></LinearLayout>

MainActivity.java

import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.app.Activity;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ProgressBar;import android.widget.Toast;public class MainActivity extends Activity {    private Button btn;    private ProgressBar pbl;    private Button btnprogressBar;    //水平进度条    private ProgressBar pbl2;    //水平进度条的最大值    private int max=100;    //水平进度条默认从0    int currentProgress=0;    Handler myhandler=new Handler(){        public void handleMessage(Message msg) {            if (msg.what==0) {                pbl.setVisibility(View.VISIBLE);            }else if (msg.what==1){                pbl.setVisibility(View.GONE);                Toast.makeText(MainActivity.this, "加载成功", Toast.LENGTH_SHORT).show();            }else if (msg.what==2){//更新水平进度条                pbl2.setProgress(currentProgress);            }        };    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        btn=(Button) findViewById(R.id.btn);        btn.setOnClickListener(new MyOnClickListener());        pbl=(ProgressBar) findViewById(R.id.progressbar);        btnprogressBar=(Button) findViewById(R.id.btnprogressbar);        btnprogressBar.setOnClickListener(new MyOnClickListenerImpl());        //水平进度条        pbl2=(ProgressBar) findViewById(R.id.pd2);        new Thread(){            @Override            public void run() {                while (currentProgress<max) {                    loadData2();                    myhandler.sendEmptyMessage(2);                }            }        }.start();    }    /**     * 加载提示     * @author Administrator     *     */    private class MyOnClickListener implements OnClickListener{        @Override        public void onClick(View v) {            Toast myToast=Toast.makeText(MainActivity.this, "自定义", Toast.LENGTH_LONG);            //获取视图            LinearLayout toastview=(LinearLayout) myToast.getView();            ImageView img=new ImageView(MainActivity.this);            img.setImageResource(R.drawable.ic_launcher);//添加图片            toastview.addView(img,0);//将图片添加到视图中       0图片在汉字上面    1图片在汉字下面            myToast.show();        }    }    private class MyOnClickListenerImpl implements OnClickListener{        @Override        public void onClick(View v) {            myhandler.sendEmptyMessage(0);            new Thread(){                @Override                public void run() {                    loadData();                    myhandler.sendEmptyMessage(1);                }            }.start();        }    }    /**     * 加载数据     */    private void loadData(){        try {            Thread.sleep(5000);//休息时间        } catch (InterruptedException e) {            e.printStackTrace();        }    }     private int loadData2(){        try {            Thread.sleep(500);        } catch (InterruptedException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return currentProgress++;    }}

效果前：
这里写图片描述
效果后：

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