android中进度条控件

进度跳控件：

ProgressBar

属性：

android:layout_width="300dp"（设置的长）android:layout_height="50dp"（设置的高）

效果：

main.xml界面

import android.os.Handler;import android.os.Message;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.ProgressBar;import android.widget.TextView;public class MainActivity extends AppCompatActivity {    private ProgressBar pb_jd;    private TextView tv_num;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        pb_jd = (ProgressBar) findViewById(R.id.pb_jd);        tv_num = (TextView) findViewById(R.id.tv_num);    }    public void xz(View view){        new MyThread().start();    }    Handler handler=new Handler(){        //接收消息，更新UI界面        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            int i=msg.what;            tv_num.setText(i+"");        }    };    class MyThread extends Thread{        @Override        public void run() {            super.run();            for (int i = 0; i <= 100; i++) {                pb_jd.setProgress(i);                //在子线程中发消息                handler.sendEmptyMessage(i);                try {                    Thread.sleep(100);                } catch (InterruptedException e) {                    e.printStackTrace();                }            }        }    }}

效果：

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