android 14 进度条和拖动条

时间:2021-04-21 17:28:14

进度条:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"> <ProgressBar 默认进度条
android:id="@+id/pb1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<ProgressBar
android:id="@+id/pb2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
style="@android:style/Widget.ProgressBar.Horizontal"
android:max="100" 最大值是100
android:progress="30"/> 初始值是30
<Button
android:id="@+id/btnDownload"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Download File"/>
</LinearLayout>
package com.sxt.day03_07;

import android.app.Activity;
import android.os.Bundle;
import android.os.SystemClock;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ProgressBar; public class MainActivity extends Activity {
ProgressBar mProgressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
setListener();
}
private void setListener() {
findViewById(R.id.btnDownload).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
new Thread(){//开出一个线程,则进度条工作的时候,不影响主线程的工作,如果不用多线程则进度条工作的时候再点击别的地方就会有问题
public void run() {
for(int i=1;i<=100;i++){
mProgressBar.setProgress(i);
SystemClock.sleep(20);//SystemClock.sleep(20)是安卓里的暂停,进度条变化一次使当前线程休眠10毫秒
}
};
}.start();
}
});
}
private void initView() {
mProgressBar=(ProgressBar) findViewById(R.id.pb2);
mProgressBar.setProgress(0);
} }

拖动条:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"> <SeekBar
android:id="@+id/seekBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:max="100"
android:progress="50"/>
</RelativeLayout>
package com.sxt.day03_08;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener; public class MainActivity extends Activity implements OnSeekBarChangeListener{
int mProgress;//代表SeekBar当前的progress值 @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SeekBar seekBar=(SeekBar) findViewById(R.id.seekBar);
seekBar.setOnSeekBarChangeListener(this);//给SeekBar添加拖动监听器
} @Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {//拖动中一直调用这个函数,fromUser为true表示润许触摸操作,progress表示当前拖动值,
mProgress=progress;
Log.i("main","progress="+progress);
} @Override
public void onStartTrackingTouch(SeekBar seekBar) {//开始拖动函数
Log.i("main","开始拖动seekbar");
} @Override
public void onStopTrackingTouch(SeekBar seekBar) {//结束拖动函数
Log.i("main","结束拖动seekbar");
} }