activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#ffffff" > <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:orientation="vertical" > <TextView android:id="@+id/num_tv" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="@drawable/publish_seekbar_dialog" android:gravity="center_horizontal" android:paddingTop="1dp" android:text="0个" android:textColor="#ffffff" /> <SeekBar android:id="@+id/seekBar1" android:layout_width="match_parent" android:layout_height="wrap_content" android:max="100" android:progress="0" android:progressDrawable="@drawable/seekbar_img" android:thumb="@drawable/thumb" /> </LinearLayout> </RelativeLayout> seekbar_img.xml <?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android="http://schemas.android.com/apk/res/android" > <!-- 背景图 --> <item android:id="@android:id/background" android:drawable="@drawable/bg"/> <!-- 进和能量图 --> <item android:id="@android:id/progress" android:drawable="@drawable/bg2"/> </layer-list> thumb.xml <?xml version="1.0" encoding="UTF-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <!-- 按下状态 --> <item android:drawable="@drawable/bg3" android:state_pressed="true"/> <!-- 普通无焦点状态 --> <item android:drawable="@drawable/bg4" android:state_focused="false" android:state_pressed="false"/> </selector
MainActivity.java
package com.example.seekbardemo;
import android.app.Activity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.widget.LinearLayout;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
public class MainActivity extends Activity {
private TextView num_tv;
private SeekBar seekBar;
private double width, fDensity;
private String numbers;
private DisplayMetrics displaysMetrics;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initSeekBarProgress();
}
private void initView() {
displaysMetrics = getResources().getDisplayMetrics();
width = displaysMetrics.widthPixels;
fDensity = (width - Utils.dip2px(this, 51)) / 100;
seekBar = (SeekBar) findViewById(R.id.seekBar1);
num_tv = (TextView) findViewById(R.id.num_tv);
}
private void initSeekBarProgress() {
seekBar.setProgress(45);
seekBar.setOnSeekBarChangeListener(mSeekChange);
LinearLayout.LayoutParams paramsStrength = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
numbers = 45 + "";
paramsStrength.leftMargin = (int) (45 * fDensity);
num_tv.setLayoutParams(paramsStrength);
num_tv.setText(numbers + "个");
}
private OnSeekBarChangeListener mSeekChange = new OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
numbers = progress + "";
LinearLayout.LayoutParams paramsStrength = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
paramsStrength.leftMargin = (int) (progress * fDensity);
num_tv.setLayoutParams(paramsStrength);
num_tv.setText(numbers + "个");
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
};
}Utils.java
package com.example.seekbardemo;
import android.content.Context;
public class Utils {
/**
* 根据手机分辨率从 px(像素) 单位 转成 dp
*/
public static int px2dip(Context context, float pxValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (pxValue / scale + 0.5f);
}
/**
* 根据手机分辨率从 dp 单位 转成 px(像素)
*/
public static int dip2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
}效果图
源码地址：http://www.apkbus.com/forum.php?mod=viewthread&tid=243597
随时随地看视频
