seekbar | 易学教程

seek bar changing text size

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问题 i want to change the text size of an edit text using seek bar and every time i close the activity and reopen it the seek bar automatically increase the text size, this is the code package com.e_orthodoxy.orthodox_prayers; public class WakeupActivity extends Activity { private SharedPreferences prefs; private SeekBar seekbar; private EditText edittext; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_wakeup);

Animate seekbar progress

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I have a screen with 4 seek bars ( As shown in the image below) . If the user moves B,C or D I calculate the average of the three and setProgress of A to the average. That was the easy part . What I would like to do is animate the progress bar A such that it does not jump in one shot (for eg from 25-75 ). What are the recommended ways to animate A? I got a simple animation up but I am calling a TimerTask every 50ms to increment or decrement A by a unit value till I reach the required position. But its not very efficient. Note: I have a custom Seekbar object using which I have created seekBar's

Android SeekBar

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什么是SeekBar控件,SeekBar控件其实就是一个高级点的进度条，就像我们在听歌，看电影用的播放器上的进度条一样，是可以拖动的，可以改变进度的一个进度条控件！就是下面这个样子 seekbar对应的方法和属性 android:thumb---seekbar 上绘制的 thumb （可拖动的那个图标） public void setOnSeekBarChangeListener (SeekBar.OnSeekBarChangeListener l) //设置一个监听器以接受seekbar进度改变时的通知。同时提供用户在SeekBar上开始和停止触摸手势时的通知。 //参数 l SeekBar的通知监听对象 //参见 SeekBar.OnSeekBarChangeListener 1.在res/layout目录下定义一个布局文件seekbar.xml <?xml version="1.0" encoding="utf-8"?> <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" > <LinearLayout android:layout_width=

Changing the TextView color depending on the progress of a SeekBar

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I am trying to change the color of the TextView depending on the SeekBar 's progress as following: 0-25% -> green 25%-50% -> yellow and so on... When I using the following code, the TextView doesn't show the value anymore. I would greatly appreciate any help! Code: public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { textView.setText(String.valueOf(progress + "%")); if(progress >= 25 && progress < 50) textView.setTextColor(R.color.Yellow); else if(progress >= 50 && progress < 75) textView.setTextColor(R.color.Orange); else if(progress >= 75 && progress <= 100)

Android学习笔记18：自定义Seekbar拖动条式样

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　　SeekBar拖动条可以由用户控制，进行拖动操作。比如，应用程序中用户需要对音量进行控制，就可以使用拖动条来实现。 1.SeekBar控件的使用 1.1SeekBar常用属性　　SeekBar的常用属性有以下一些： android:max[integer]//设置拖动条的最大值 android:progress[integer]//设置当前的进度值 android:secondaryProgress[integer]//设置第二进度，通常用做显示视频等的缓冲效果 android:thumb[drawable]//设置滑块的图样 android:progressDrawable[drawable]//设置进度条的图样 1.2SeekBar事件监听器　　在使用SeekBar时，我们可以通过设置事件监听器setOnSeekBarChangeListener来获取SeekBar的当前状态。在SeekBar中通常需要监听以下3个事件： public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser); public void onStartTrackingTouch(SeekBar seekBar); public void onStopTrackingTouch(SeekBar

Android: Custom Drawable in a SeekBar widget is drawing aliased images

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Problem is when I am using a custom progressDrawable in a SeekBar widget (perhaps incorrectly) it is rendered in a very aliased/ugly/low quality form. I have set "drawingCacheQuality" to high and there is no difference. Anyone have any ideas? Am developing on a Nexus One (OS 2.2.1) with target build for project as API 1.5 (though I would hope that shouldn't matter). Here is a sample of what it looks like: My aim is to create a simple nifty visual switch with two states (on and off), and a slider to move between them. I didn't really see a better widget for this and practically everything is

How to make SeekBar take up full width of parent

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问题 I have a SeekBar in a RelativeLayout whose width is equal to the screen width. I applied layout_width="match_parent" to the SeekBar but it seems to keep some empty space on both sides of the SeekBar to accommodate the thumb. I also tried using android:thumb="@null" The thumb is gone but not the empty space on the sides. I really need to make the SeekBar width match the parent's. Could somebody help me with this? Maybe I could create a custom SeekBar class and set the width to the parent width

How to cancel a thread

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I am trying to make a media player which has a seekbar . As the seekbar should stop progress when pause is pressed or stop is pressed. I want to stop the thread accordingly. Moreover when back is pressed I want to cancel the thread again. Use Thread.currentThread().interrupt() Thread interruption Every thread has a Boolean property associated with it that represents its interrupted status. The interrupted status is initially false; when a thread is interrupted by some other thread through a call to Thread.interrupt(), one of two things happens. If that thread is executing a low-level

How to show tick marks for Discrete Slider?

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问题 I'm trying to style a seekbar/slider like the one labeled Discrete Slider - Click (that has the little tick mark indicators) in the Material Design Guidelines. I can't figure out the magical incantation to have the tickmarks show up, does anyone know how to do this? I have a seekbar with 5 positions (0-4) <SeekBar android:layout_width="match_parent" android:layout_height="wrap_content" android:max="4" /> 回答1: Add tick marks with the style attribute: <SeekBar android:id="@+id/seekBar" style="

SeekBar's thumb only appears when touched

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I want to have a SeekBar with a thumb that appears as the user interacts with it (by dragging it to the desired location) and disappears after the interaction. Today my SeekBar looks like this: <SeekBar android:id="@+id/seekBar_volume" android:layout_width="fill_parent" android:progressDrawable="@drawable/custom_player_seekbar_background" android:paddingTop="10px" android:paddingBottom="10px" android:thumb="@drawable/myThumb" android:paddingLeft="30px" android:paddingRight="30px" android:minHeight="6dip" android:maxHeight="6dip" android:layout_height="wrap_content" android:layout