android 中ProgressBar的使用

Posted 2020-09-25

教程适合初级：

 

1.主线程接收下载完成的消息
private Handler mhandler = new Handler(new Handler.Callback() {
    @Override
    public boolean handleMessage(Message message) {
        mprogressBar.setMax(100);//设置最大
        mprogressBar.setProgress(counter);//进度值
        return false;
    }
});
2.LayoutInflater.from布局管理器

/*

从一个Context中，获得一个布局填充器，这样你就可以使用这个填充器来把xml布局文件转为View对象了。
   //加载布局管理器
     LayoutInflater inflater = LayoutInflater.from(context);
     //将xml布局转换为view对象
     convertView = inflater.inflate(R.layout.item_myseallist,parent, false);
     //利用view对象，找到布局中的组件
     convertView.findViewById(R.id.delete);
 */
mprogressBar = (ProgressBar) LayoutInflater.from(this).inflate(R.layout.process,null);
3.view设置.setProgressBar

mStreetView.setProgressBar(mprogressBar);
4.子线程下载，发送消息

  //子线程
private void startProcess() {

    new Thread(){
        public static final int MSG = 1;
        @Override
        public void run() {

            if (counter< max){
                counter += 10;//一次增加10

                Message msg = new Message();
                msg.what = MSG;
                mhandler.sendMessage(msg);
            }
       }
   };
}
5.将进度条设置颜色等。

以下为全部代码：

public class StreetView extends Activity implements View.OnClickListener{
    private com.leador.streetview.truevision.StreetView mStreetView,mStreetView1;
    private TextView tv_title;
    private LinearLayout ll_back;
    private ProgressBar mprogressBar;
    int counter=0;

    private Handler mhandler = new Handler(new Handler.Callback() {
        @Override
        public boolean handleMessage(Message message) {
            mprogressBar.setMax(100);//设置最大
            mprogressBar.setProgress(counter);//进度值
            return false;
        }
    });


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_street_view);

        /*
        /从一个Context中，获得一个布局填充器，这样你就可以使用这个填充器来把xml布局文件转为View对象了。

           //加载布局管理器
             LayoutInflater inflater = LayoutInflater.from(context);
             //将xml布局转换为view对象
             convertView = inflater.inflate(R.layout.item_myseallist,parent, false);
             //利用view对象，找到布局中的组件
             convertView.findViewById(R.id.delete);
         */
        mprogressBar = (ProgressBar) LayoutInflater.from(this).inflate(R.layout.process,null);

        tv_title = (TextView) findViewById(R.id.tv_top);
        ll_back = (LinearLayout) findViewById(R.id.ll_back);
        mStreetView = (com.leador.streetview.truevision.StreetView) findViewById(R.id.gl);
        mStreetView1 = (com.leador.streetview.truevision.StreetView) findViewById(R.id.gl1);

        init();
        loadStreetView();
        startProcess();
    }

    private void  init(){
        tv_title.setText("woququququuq");

        mStreetView.setProgressBar(mprogressBar);
        mStreetView1.setProgressBar(mprogressBar);

        ll_back.setOnClickListener(this);
    }

      //子线程
    private void startProcess() {

        new Thread(){
            public static final int MSG = 1;
            @Override
            public void run() {

                if (counter< max){
                    counter += 10;//一次增加10

                    Message msg = new Message();
                    msg.what = MSG;
                    mhandler.sendMessage(msg);
                }
           }
       };
    }

    private void loadStreetView(){
        mStreetView.setStreetViewFirstLoadListener(new StreetViewFirstLoadListener() {
            @Override
            public void firstLoad() {
                mStreetView.loadStreetViewByPosition(110.4010705,19.977281293);
            }
        });

        mStreetView1.setStreetViewFirstLoadListener(new StreetViewFirstLoadListener() {
            @Override
            public void firstLoad() {
                mStreetView1.loadStreetViewByPosition(110.4010705,19.977281293);
            }
        });
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.ll_back:
                finish();
                break;
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mStreetView.finish();
    }
}

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