以下ProgressBar跟Handle结合,模拟进度条的使用,当进度条完成时会跳转到TestActivity
main.xml布局文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<!-- 长方形进度条,一开始不可见,直到点击按钮时才出现进度条 -->
<ProgressBar android:id="@+id/progressBar"
style="?android:attr/progressBarStyleHorizontal"
mce_style="?android:attr/progressBarStyleHorizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:visibility="gone"
android:max="100"/>
<!-- 圆形进度条 -->
<!--<ProgressBar android:id="@+id/progressBar"
style="?android:attr/progressBarStyleLarge"
mce_style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>-->
<Button android:id="@+id/start"
android:text="启动进度条"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button android:id="@+id/stop"
android:text="停止进度条"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
PbActivity类
package com.ljq.pb;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
publicclass PbActivity extends Activity {
private ProgressBar progressBar =null;
private Button start =null, stop =null;
// 定义Handler对象
private Handler handler =new Handler();
@Override
publicvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
progressBar.setProgress(0);
start = (Button) findViewById(R.id.start);
start.setOnClickListener(new View.OnClickListener() {
publicvoid onClick(View v) {
handler.post(runnable); //开始执行
}
});
stop=(Button)findViewById(R.id.stop);
stop.setOnClickListener(new View.OnClickListener() {
publicvoid onClick(View v) {
handler.removeCallbacks(runnable);//停止执行
progressBar.setProgress(0);
}
});
}
int pro=0;
Runnable runnable=new Runnable(){
publicvoid run() {
progressBar.setVisibility(View.VISIBLE);
pro=progressBar.getProgress()+10;
progressBar.setProgress(pro);
//如果进度小于100,,则延迟1000毫秒后重复执行runnable
if(pro<100){
handler.postDelayed(runnable, 1000);
}else{
progressBar.setVisibility(View.GONE);
startActivity(new Intent(PbActivity.this, TestActivity.class));
handler.removeCallbacks(runnable);
progressBar.setProgress(0);
}
}
};
}