怎么在Android中實(shí)現(xiàn)一個(gè)懸浮按鈕
怎么在Android中實(shí)現(xiàn)一個(gè)懸浮按鈕？針對(duì)這個(gè)問題，這篇文章詳細(xì)介紹了相對(duì)應(yīng)的分析和解答，希望可以幫助更多想解決這個(gè)問題的小伙伴找到更簡(jiǎn)單易行的方法。
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具體實(shí)現(xiàn)代碼：
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Point;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.widget.ImageView;
import com.iapppay.openid.channel.LoginResultCallback;
import com.iapppay.openid.channel.OpenIDApplication;
import com.iapppay.openid.channel.util.DisplayUtil;
import com.iapppay.openid.channel.util.LogUtil;
import com.iapppay.openid.channel.util.Res;
/**
* Created by HuangTiebing 2017/2/14.
*/
public class DragFloatActionButton extends ImageView implements View.OnTouchListener, View.OnClickListener {
public static String TAG = "DragFloatActionButton";
private Context context;
float lastX, lastY;
float originX, originY;
int screenWidth;
int screenHeight;
private int originWidth;
private WindowManager windowManager;
// // 此windowManagerParams變量為獲取的全局變量，用以保存懸浮窗口的屬性
private WindowManager.LayoutParams windowManagerParams;
private LoginResultCallback resultCallback; //懸浮按鈕點(diǎn)擊回調(diào)
public DragFloatActionButton(Context context, boolean isForceLogin, LoginResultCallback resultCallback) {
this(context, null);
OpenIDApplication.getInstance().setForceLogin(isForceLogin);
this.resultCallback = resultCallback;
}
public DragFloatActionButton(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public DragFloatActionButton(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
this.context = context;
Point screenSize = DisplayUtil.getScreenSize(context);
screenWidth = screenSize.x;
screenHeight = screenSize.y;
setImageResource(Res.drawable(context, "ipay_float_btn_bg"));
setOnTouchListener(this);
setOnClickListener(this);
windowManager = (WindowManager) getContext().getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
}
public int getOriginWidth() {
return originWidth;
}
public void setOriginWidth(int originWidth) {
this.originWidth = originWidth;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
windowManagerParams = (WindowManager.LayoutParams) this.getLayoutParams();
//獲取到狀態(tài)欄的高度
Rect frame = new Rect();
getWindowVisibleDisplayFrame(frame);
int ea = event.getAction();
switch (ea) {
case MotionEvent.ACTION_DOWN:
lastX = event.getRawX();// 獲取觸摸事件觸摸位置的原始X坐標(biāo)
lastY = event.getRawY();
originX = lastX;
originY = lastY;
break;
case MotionEvent.ACTION_MOVE:
float dx = event.getRawX() - lastX;
float dy = event.getRawY() - lastY;
windowManagerParams.x += dx;
windowManagerParams.y += dy;
LogUtil.d(TAG, "移動(dòng)距離：dx=" + dx + "，dy=" + dy);
showAllBtn();
lastX = (int) event.getRawX();
lastY = (int) event.getRawY();
break;
case MotionEvent.ACTION_UP:
float lastMoveDx = Math.abs(event.getRawX() - originX);
float lastMoveDy = Math.abs(event.getRawY() - originY);
LogUtil.d(TAG, "松開時(shí)，移動(dòng)距離：lastMoveDx=" + lastMoveDx + ", lastMoveDy=" + lastMoveDy);
if (lastMoveDx < 10 && lastMoveDy < 10) { //移動(dòng)距離太小，視為點(diǎn)擊，
return false;
} else {
updateViewLayout(event);
isFirstClick = true;
return true;
}
}
return false;
}
/**
* 顯示整個(gè)圖標(biāo)
*/
public void showAllBtn() {
windowManagerParams.width = originWidth;
windowManagerParams.height = originWidth;
setImageResource(Res.drawable(context, "ipay_float_btn_bg"));
windowManager.updateViewLayout(this, windowManagerParams); // 刷新顯示
}
/**
* 懸浮按鈕顯示在左邊
*/
private void showInLeft() {
windowManagerParams.x = 0;
windowManagerParams.width = originWidth / 2;
windowManagerParams.height = originWidth;
setImageResource(Res.drawable(context, "ipay_float_btn_left_hidden"));
windowManager.updateViewLayout(this, windowManagerParams); // 刷新顯示
}
/**
* 懸浮按鈕顯示在右邊
*/
private void showInRight() {
windowManagerParams.width = originWidth / 2;
windowManagerParams.height = originWidth;
windowManagerParams.x = screenWidth - windowManagerParams.width;
setImageResource(Res.drawable(context, "ipay_float_btn_right_hidden"));
windowManager.updateViewLayout(this, windowManagerParams); // 刷新顯示
}
/**
* 懸浮按鈕顯示在上面
*/
private void showInTop() {
windowManagerParams.y = 0;
windowManagerParams.width = originWidth;
windowManagerParams.height = originWidth / 2;
setImageResource(Res.drawable(context, "ipay_float_btn_top_hidden"));
windowManager.updateViewLayout(this, windowManagerParams); // 刷新顯示
}
/**
* 懸浮按鈕顯示在下面
*/
private void showInBottom() {
windowManagerParams.width = originWidth;
windowManagerParams.height = originWidth / 2;
windowManagerParams.y = screenHeight - windowManagerParams.width;
setImageResource(Res.drawable(context, "ipay_float_btn_bottom_hidden"));
windowManager.updateViewLayout(this, windowManagerParams); // 刷新顯示
}
/**
* 更新懸浮圖標(biāo)
*
* @param event 手動(dòng)移動(dòng)事件
*/
public void updateViewLayout(MotionEvent event) {
Point center = new Point(screenWidth / 2, screenHeight / 2); //屏幕中心點(diǎn)
float xOffset, yOffset;//以屏幕中心點(diǎn)為原點(diǎn)，X軸和Y軸上的偏移量
if (event != null) {//手動(dòng)移動(dòng)的
xOffset = event.getRawX() - center.x;
yOffset = event.getRawY() - center.y;
} else {//自動(dòng)隱藏
xOffset = lastX - center.x;
yOffset = lastY - center.y;
}
if (Math.abs(xOffset) >= Math.abs(yOffset)) {//向左或向右縮進(jìn)隱藏
if (xOffset <= 0) { //向左縮進(jìn)
showInLeft();
} else {
showInRight();
}
} else {//向上或向下縮進(jìn)隱藏
if (yOffset <= 0) {//向上縮進(jìn)
showInTop();
} else {
showInBottom();
}
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
Point screenSize = DisplayUtil.getScreenSize(context);
if (screenWidth != screenSize.x) {//屏幕旋轉(zhuǎn)切換
screenWidth = screenSize.x;
screenHeight = screenSize.y;
lastY = windowManagerParams.x;
lastX = windowManagerParams.y;
windowManagerParams.x = (int) lastX;
windowManagerParams.y = (int) lastY;
updateViewLayout(null);
}
}
private boolean isFirstClick = true;
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
}
@Override
public void onClick(View v) {
LogUtil.d(TAG, "執(zhí)行點(diǎn)擊事件");
if (!isFirstClick) {
OpenIDApplication.getInstance().floatBtnClick(context, OpenIDApplication.getInstance().isForceLogin(), resultCallback);
} else {//半隱藏狀態(tài)，點(diǎn)擊顯示全部
isFirstClick = false;
showAllBtn();
}
}
}調(diào)用實(shí)現(xiàn)代碼，這里注意有個(gè)問題，彈出系統(tǒng)級(jí)的懸浮窗，需要配置權(quán)限：
并且Android 6.0以上的手機(jī)，還要彈出對(duì)話框問用戶是否運(yùn)行，如果這個(gè)用戶拒絕了，就不能彈出系統(tǒng)級(jí)的懸浮窗了，還有個(gè)別手機(jī)廠商修改了android源碼，還需要進(jìn)系統(tǒng)設(shè)置里去允許這個(gè)應(yīng)用彈出懸浮窗。這樣的話就體驗(yàn)感非常不好，不過這里有個(gè)小技巧，按下面方式設(shè)置為toast類型就完全解決，既不用配置權(quán)限，也不彈出窗來向用戶獲取權(quán)限，完全解決問題。
WindowManager.LayoutParams windowManagerParams = new WindowManager.LayoutParams(WindowManager.LayoutParams.TYPE_TOAST, WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, PixelFormat.TRANSLUCENT);
具體實(shí)現(xiàn)代碼如下：
DragFloatActionButton floatBtn = new DragFloatActionButton(context, isForceLogin, mResultCallback); WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); // 設(shè)置LayoutParams(全局變量）相關(guān)參數(shù) WindowManager.LayoutParams windowManagerParams = new WindowManager.LayoutParams(WindowManager.LayoutParams.TYPE_TOAST, WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, PixelFormat.TRANSLUCENT); /** * 注意，flag的值可以為： * 下面的flags屬性的效果形同“鎖定”。 * 懸浮窗不可觸摸，不接受任何事件,同時(shí)不影響后面的事件響應(yīng)。 * LayoutParams.FLAG_NOT_TOUCH_MODAL 不影響后面的事件 * LayoutParams.FLAG_NOT_FOCUSABLE 不可聚焦 * LayoutParams.FLAG_NOT_TOUCHABLE 不可觸摸 */ // 調(diào)整懸浮窗口至左上角，便于調(diào)整坐標(biāo) windowManagerParams.gravity = Gravity.LEFT | Gravity.TOP; // 以屏幕左上角為原點(diǎn)，設(shè)置x、y初始值 windowManagerParams.x = 0; windowManagerParams.y = 0; // 設(shè)置懸浮窗口長寬數(shù)據(jù) floatBtn.measure(0, 0); floatBtn.setOriginWidth(floatBtn.getMeasuredWidth() - 50); windowManagerParams.width = floatBtn.getOriginWidth(); windowManagerParams.height = windowManagerParams.width; // 顯示myFloatView圖像 windowManager.addView(floatBtn, windowManagerParams);
關(guān)于怎么在Android中實(shí)現(xiàn)一個(gè)懸浮按鈕問題的解答就分享到這里了，希望以上內(nèi)容可以對(duì)大家有一定的幫助，如果你還有很多疑惑沒有解開，可以關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道了解更多相關(guān)知識(shí)。
文章名稱：怎么在Android中實(shí)現(xiàn)一個(gè)懸浮按鈕
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