Android custom Slide button, android slide

Android custom Slide button, android slide

When I first came into contact with a company project, I was asked to draw pages, which also involved custom views that I hated most. However, I had to do anything I hated. After searching Baidu resources, finally, a sliding control is written. Let's talk about the code.

 

 

 

Package com. etong. cpms. widget;

Import com. etong. cpms. activity. R;

Import android. content. Context;
Import android. graphics. Bitmap;
Import android. graphics. BitmapFactory;
Import android. graphics. Canvas;
Import android. graphics. Color;
Import android. graphics. Matrix;
Import android. graphics. Paint;
Import android. util. AttributeSet;
Import android. view. MotionEvent;
Import android. view. View;
Import android. view. View. OnTouchListener;

Public class WiperSwitch extends View implements OnTouchListener {
Private Bitmap bg_on, bg_off, slipper_btn;
Private String mOnText = "open ";
Private String mOffText = "disabled ";
/**
* X at press time and current x
*/
Private float downX, nowX;

/**
* Record whether the user is sliding
*/
Private boolean onSlip = false;

/**
* Current Status
*/
Private boolean nowStatus = false;

/**
* Listener Interface
*/
Private OnChangedListener listener;


Public WiperSwitch (Context context ){
Super (context );
Init ();
}

Public WiperSwitch (Context context, AttributeSet attrs ){
Super (context, attrs );
Init ();
}

Public void init (){
// Load image resources
Bg_on = BitmapFactory. decodeResource (getResources (), R. drawable. switch_bkg_switsource );
Bg_off = BitmapFactory. decodeResource (getResources (), R. drawable. switch_bkg_switsource );
Slipper_btn = BitmapFactory. decodeResource (getResources (), R. drawable. switch_btn_slip1 );
SetOnTouchListener (this );
}

Protected void onDraw (Canvas canvas ){
Super. onDraw (canvas );
Matrix matrix = new Matrix ();
Paint paint = new Paint ();
Float x = 0;

// Set the background, on, or off status based on nowX
If (nowX <(bg_on.getWidth ()/2 )){
Canvas. drawBitmap (bg_off, matrix, paint); // draws the background when the image is disabled.
Paint. setColor (Color. WHITE );
Paint. setFakeBoldText (true );
Paint. setTextSize (40 );
Canvas. drawText (mOffText, (bg_off.getWidth ()-slipper_btn.getWidth ()/2, (bg_off.getHeight () + 30)/2, paint );
} Else {
Canvas. drawBitmap (bg_on, matrix, paint); // draws the background when the image is opened.
Canvas. drawBitmap (bg_on, matrix, paint); // draws the background when the image is opened.
Paint. setColor (Color. WHITE );
Paint. setFakeBoldText (true );
Paint. setTextSize (40 );
Canvas. drawText (mOnText, (bg_on.getWidth ()-slipper_btn.getWidth ()/2, (bg_on.getHeight () + 30)/2, paint );
}

If (onSlip) {// whether it is in the slide status,
If (nowX> = bg_on.getWidth () // specifies whether to specify a range. This judgment is required because the slider cannot be redirected to an external header.
X = bg_on.getWidth ()-slipper_btn.getWidth ()/2; // minus the length of the slider 1/2
Else
X = nowX-slipper_btn.getWidth ()/2;
} Else {
If (nowStatus) {// set the x value of the slider based on the current status
X = bg_on.getWidth ()-slipper_btn.getWidth ();
} Else {
X = 0;
}
}

// Handle the slider slide exception, so the slider cannot be moved out of bounds
If (x <0 ){
X = 0;
}
Else if (x> bg_on.getWidth ()-slipper_btn.getWidth ()){
X = bg_on.getWidth ()-slipper_btn.getWidth ();
}

// Draw the slider
Canvas. drawBitmap (slipper_btn, x, 0, paint );
}

@ Override
Public boolean onTouch (View v, MotionEvent event ){
Switch (event. getAction ()){
Case MotionEvent. ACTION_DOWN :{
If (event. getX ()> bg_off.getWidth () | event. getY ()> bg_off.getHeight ()){
Return false;
} Else {
OnSlip = true;
DownX = event. getX ();
NowX = downX;
}
Break;
}
Case MotionEvent. ACTION_MOVE :{
NowX = event. getX ();
Break;
}
Case MotionEvent. ACTION_UP :{
OnSlip = false;
If (event. getX ()> = (bg_on.getWidth ()/2 )){
NowStatus = true;
NowX = bg_on.getWidth ()-slipper_btn.getWidth ();
} Else {
NowStatus = false;
NowX = 0;
}

If (listener! = Null ){
Listener. OnChanged (WiperSwitch. this, nowStatus );
}
Break;
}
}
// Refresh the page
Invalidate ();
Return true;
}



/**
* Sets a listener for the WiperSwitch for external calls.
* @ Param listener
*/
Public void setOnChangedListener (OnChangedListener listener ){
This. listener = listener;
}

/**
* Set the initial status of the slide switch for external calls.
* @ Param checked
*/
Public void setChecked (boolean checked ){
If (checked ){
NowX = bg_off.getWidth ();
} Else {
NowX = 0;
}
NowStatus = checked;
}
/**
* Callback Interface
* @ Author len
*
*/
Public interface OnChangedListener {
Public void OnChanged (WiperSwitch wiperSwitch, boolean checkState );
}


}