分享程序员开发的那些事...
更新时间：2022-08-22 09:59:48
1.attrs属性：
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<?xml version="1.0" encoding="utf-8"?>
<resources> <string name="app_name">EX_templete</string>
<string name="action_settings">Settings</string>
<string name="hello_world">Hello world!</string>
<declare-styleable name="SmoothButton">
<attr name="transitionDrawable" format="reference" />
<attr name="transitionDrawableLength" format="integer" />
<attr name="transitionTextColorUp" format="color" />
<attr name="transitionTextColorDown" format="color" />
</declare-styleable>
</resources> |
2.layout设置：
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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:misc="http://schemas.android.com/apk/res/com.example.ex_templete"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<com.example.ex_templete.SmoothButton
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/red_button"
android:text="smooth button 1"
misc:transitionDrawable="@drawable/red_transition_list"
misc:transitionDrawableLength="8"
misc:transitionTextColorDown="#aaa"
misc:transitionTextColorUp="#eee" />
</RelativeLayout> |
3.自定义控件SmoothButton类：
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import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LevelListDrawable;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.widget.Button;
public class SmoothButton extends Button
{ private static final long DELAY = 25;
private int transitionDrawableLength;
private int level;
private int[] colors;
private boolean wasPressed;
private Drawable background;
public SmoothButton(Context context, AttributeSet attrs)
{
super(context, attrs);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SmoothButton);
LevelListDrawable transitionDrawable = (LevelListDrawable) a.getDrawable(R.styleable.SmoothButton_transitionDrawable);
transitionDrawableLength = a.getInt(R.styleable.SmoothButton_transitionDrawableLength, 0);
int useTextColors = 0;
int c0 = 0;
if (a.hasValue(R.styleable.SmoothButton_transitionTextColorUp))
{
c0 = a.getColor(R.styleable.SmoothButton_transitionTextColorUp, 0);
useTextColors++;
}
int c1 = 0;
if (useTextColors == 1 && a.hasValue(R.styleable.SmoothButton_transitionTextColorDown))
{
c1 = a.getColor(R.styleable.SmoothButton_transitionTextColorDown, 0);
useTextColors++;
}
a.recycle();
if (transitionDrawable == null)
{
throw new RuntimeException("transitionDrawable must be defined in XML (with valid xmlns)");
}
if (transitionDrawableLength == 0)
{
throw new RuntimeException("transitionDrawableLength must be defined in XML (with valid xmlns)");
}
if (useTextColors == 2)
{
setTextColor(c0);
int a0 = Color.alpha(c0);
int r0 = Color.red(c0);
int g0 = Color.green(c0);
int b0 = Color.blue(c0);
int a1 = Color.alpha(c1);
int r1 = Color.red(c1);
int g1 = Color.green(c1);
int b1 = Color.blue(c1);
colors = new int[transitionDrawableLength];
for (int i = 0; i < transitionDrawableLength; i++)
{
int ai = a0 + i * (a1 - a0) / transitionDrawableLength;
int ri = r0 + i * (r1 - r0) / transitionDrawableLength;
int gi = g0 + i * (g1 - g0) / transitionDrawableLength;
int bi = b0 + i * (b1 - b0) / transitionDrawableLength;
colors[i] = Color.argb(ai, ri, gi, bi);
}
}
int[] viewAttrs =
{ android.R.attr.background };
a = context.obtainStyledAttributes(attrs, viewAttrs);
boolean has a.hasValue(0);
a.recycle();
if (!hasBackground)
{
int l = getPaddingLeft();
int t = getPaddingTop();
int r = getPaddingRight();
int b = getPaddingBottom();
setBackgroundDrawable(transitionDrawable);
setPadding(l, t, r, b);
}
background = getBackground();
level = 0;
background.setLevel(level);//通过此方法设置一组图片为背景**************************************
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
boolean rc = super.onKeyDown(keyCode, event);
if ((keyCode == KeyEvent.KEYCODE_ENTER || keyCode == KeyEvent.KEYCODE_DPAD_CENTER) && event.getRepeatCount() == 0
&& level + 1 < transitionDrawableLength)
{
handler.removeMessages(-1);
handler.sendEmptyMessageDelayed(1, DELAY);
}
return rc;
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent event)
{
boolean rc = super.onKeyUp(keyCode, event);
if ((keyCode == KeyEvent.KEYCODE_ENTER || keyCode == KeyEvent.KEYCODE_DPAD_CENTER) && event.getRepeatCount() == 0 && level > 0)
{
handler.removeMessages(1);
handler.sendEmptyMessageDelayed(-1, DELAY);
}
return rc;
}
@Override
public boolean onTouchEvent(MotionEvent event)
{
wasPressed = isPressed();
boolean rc = super.onTouchEvent(event);
post(checkPressed);
return rc;
}
Runnable checkPressed = new Runnable()
{
public void run()
{
if (!wasPressed && isPressed())
{
if (level + 1 < transitionDrawableLength)
{
handler.removeMessages(-1);
handler.sendEmptyMessageDelayed(1, DELAY);
}
}
else if (wasPressed && !isPressed())
{
if (level > 0)
{
handler.removeMessages(1);
handler.sendEmptyMessageDelayed(-1, DELAY);
}
}
}
};
private Handler handler = new Handler()
{
@Override
public void handleMessage(Message msg)
{
int what = msg.what;
level += what;
if (level >= 0 && level < transitionDrawableLength)
{
background.setLevel(level);
if (colors != null)
{
setTextColor(colors[level]);
}
sendEmptyMessageDelayed(what, DELAY);
}
else
{
level = Math.max(0, level);
level = Math.min(transitionDrawableLength - 1, level);
}
}
};
} |
4.MainActivity
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import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
public class MainActivity extends Activity
{ @Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
} |