Android 滑动开关按钮源码
2016-06-07 09:38
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AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.qing" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" /> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@android:style/Theme.NoTitleBar" > <activity android:label="@string/app_name" android:name=".MainActivity" > <intent-filter > <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
package com.baidu; import com.baidu.MySlipSwitch.OnSwitchListener; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast; public class MainActivity extends Activity { private Button switch_Btn; private MySlipSwitch slipswitch_MSL; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); slipswitch_MSL = (MySlipSwitch)findViewById(R.id.main_myslipswitch); slipswitch_MSL.setImageResource(R.drawable.bkg_switch, R.drawable.bkg_switch, R.drawable.btn_slip); slipswitch_MSL.setSwitchState(true); slipswitch_MSL.setOnSwitchListener(new OnSwitchListener() { @Override public void onSwitched(boolean isSwitchOn) { // TODO Auto-generated method stub if(isSwitchOn) { Toast.makeText(MainActivity.this, "开关已经开启", 300).show(); } else { Toast.makeText(MainActivity.this, "开关已经关闭", 300).show(); } } }); switch_Btn = (Button)findViewById(R.id.main_button_switch); switch_Btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub slipswitch_MSL.updateSwitchState(!slipswitch_MSL.getSwitchState()); if(slipswitch_MSL.getSwitchState()) { Toast.makeText(MainActivity.this, "开关已经开启", 300).show(); } else { Toast.makeText(MainActivity.this, "开关已经关闭", 300).show(); } } }); } }
package com.<span style="font-family: Arial, Helvetica, sans-serif;">baidu</span>;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
public class MySlipSwitch extends View implements OnTouchListener {
//开关开启时的背景,关闭时的背景,滑动按钮
private Bitmap switch_on_Bkg, switch_off_Bkg, slip_Btn;
private Rect on_Rect, off_Rect;
//是否正在滑动
private boolean isSlipping = false;
//当前开关状态,true为开启,false为关闭
private boolean isSwitchOn = false;
//手指按下时的水平坐标X,当前的水平坐标X
private float previousX, currentX;
//开关监听器
private OnSwitchListener onSwitchListener;
//是否设置了开关监听器
private boolean isSwitchListenerOn = false;
public MySlipSwitch(Context context) {
super(context);
init();
}
public MySlipSwitch(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
setOnTouchListener(this);
}
protected void setImageResource(int switchOnBkg, int switchOffBkg, int slipBtn) {
switch_on_Bkg = BitmapFactory.decodeResource(getResources(), switchOnBkg);
switch_off_Bkg = BitmapFactory.decodeResource(getResources(), switchOffBkg);
slip_Btn = BitmapFactory.decodeResource(getResources(), slipBtn);
//右半边Rect,即滑动按钮在右半边时表示开关开启
on_Rect = new Rect(switch_off_Bkg.getWidth() - slip_Btn.getWidth(), 0, switch_off_Bkg.getWidth(), slip_Btn.getHeight());
//左半边Rect,即滑动按钮在左半边时表示开关关闭
off_Rect = new Rect(0, 0, slip_Btn.getWidth(), slip_Btn.getHeight());
}
protected void setSwitchState(boolean switchState) {
isSwitchOn = switchState;
}
protected boolean getSwitchState() {
return isSwitchOn;
}
protected void updateSwitchState(boolean switchState) {
isSwitchOn = switchState;
invalidate();
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
Matrix matrix = new Matrix();
Paint paint = new Paint();
//滑动按钮的左边坐标
float left_SlipBtn;
//手指滑动到左半边的时候表示开关为关闭状态,滑动到右半边的时候表示开关为开启状态
if(currentX < (switch_on_Bkg.getWidth() / 2)) {
canvas.drawBitmap(switch_off_Bkg, matrix, paint);
} else {
canvas.drawBitmap(switch_on_Bkg, matrix, paint);
}
//判断当前是否正在滑动
if(isSlipping) {
if(currentX > switch_on_Bkg.getWidth()) {
left_SlipBtn = switch_on_Bkg.getWidth() - slip_Btn.getWidth();
} else {
left_SlipBtn = currentX - slip_Btn.getWidth() / 2;
}
} else {
//根据当前的开关状态设置滑动按钮的位置
if(isSwitchOn) {
left_SlipBtn = on_Rect.left;
} else {
left_SlipBtn = off_Rect.left;
}
}
//对滑动按钮的位置进行异常判断
if(left_SlipBtn < 0) {
left_SlipBtn = 0;
} else if(left_SlipBtn > switch_on_Bkg.getWidth() - slip_Btn.getWidth()) {
left_SlipBtn = switch_on_Bkg.getWidth() - slip_Btn.getWidth();
}
canvas.drawBitmap(slip_Btn, left_SlipBtn, 0, paint);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// TODO Auto-generated method stub
setMeasuredDimension(switch_on_Bkg.getWidth(), switch_on_Bkg.getHeight());
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
switch(event.getAction()) {
//滑动
case MotionEvent.ACTION_MOVE:
currentX = event.getX();
break;
//按下
case MotionEvent.ACTION_DOWN:
if(event.getX() > switch_on_Bkg.getWidth() || event.getY() > switch_on_Bkg.getHeight()) {
return false;
}
isSlipping = true;
previousX = event.getX();
currentX = previousX;
break;
//松开
case MotionEvent.ACTION_UP:
isSlipping = false;
//松开前开关的状态
boolean previousSwitchState = isSwitchOn;
if(event.getX() >= (switch_on_Bkg.getWidth() / 2)) {
isSwitchOn = true;
} else {
isSwitchOn = false;
}
//如果设置了监听器,则调用此方法
if(isSwitchListenerOn && (previousSwitchState != isSwitchOn)) {
onSwitchListener.onSwitched(isSwitchOn);
}
break;
default:
break;
}
//重新绘制控件
invalidate();
return true;
}
public void setOnSwitchListener(OnSwitchListener listener) {
onSwitchListener = listener;
isSwitchListenerOn = true;
}
public interface OnSwitchListener {
abstract void onSwitched(boolean isSwitchOn);
}
}
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout android:layout_height="fill_parent" android:layout_width="fill_parent" android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android">
<RelativeLayout android:layout_height="wrap_content" android:layout_width="fill_parent" android:layout_marginTop="20dp">
<Button android:layout_height="wrap_content" android:layout_width="wrap_content" android:textSize="15sp" android:text="切换状态" android:paddingBottom="3dp" android:paddingRight="25dp" android:paddingTop="3dp" android:paddingLeft="25dp" android:layout_marginLeft="15dp" android:layout_centerVertical="true" android:layout_alignParentLeft="true" android:id="@+id/main_button_switch"/>
<com.qing.MySlipSwitch android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_centerVertical="true" android:id="@+id/mainmyslipswitch" android:layout_marginRight="20dp" android:layout_alignParentRight="true"/>
</RelativeLayout>
</LinearLayout>
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