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昨天那上面东西太多,今天再从新开个项目,老办法新建个项目,然后把activity_main.xml文件修改为:- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical"
- android:layout_height="match_parent"
- android:layout_width="match_parent">
- <ProgressBar
- android:id="@+id/progress_bar"
- android:layout_width="match_parent"
- android:layout_height="60dp"
- style="?android:attr/progressBarStyleHorizontal"
- android:max="100"
- />
- <Button
- android:id="@+id/button"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:text="button"/>
- </LinearLayout>
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然后把mainactivity.java修改为:
- package com.example.xinwei.viewcontroller2;
- import android.support.v7.app.AppCompatActivity;
- import android.os.Bundle;
- import android.view.View;
- import android.widget.Button;
- import android.widget.ProgressBar;
- public class MainActivity extends AppCompatActivity {
- private Button button;
- private ProgressBar progressBar;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- makeProgressBarMove();
- }
- private void makeProgressBarMove() {
- button = (Button)findViewById(R.id.button);
- progressBar =(ProgressBar)findViewById(R.id.progress_bar);
- button.setOnClickListener(new View.OnClickListener() {
- @Override
- public void onClick(View view) {
- int progress=progressBar.getProgress();
- progressBar.incrementProgressBy(5);
- if(progress==100){
- progressBar.setVisibility(View.GONE);
- }
- }
- });
- }
- }
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效果图:
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