本文實例為大家分享了Android實現懸浮圖片的具體代碼，供大家參考，具體內容如下

@SuppressLint('AppCompatCustomView')public class MoveImageView extends ImageView { //按下那一刻的坐標和 控件上下左右距離 private float lastX; private float lastY; private int left; private int top; private int right; private int bottom; //如果是拖動事件就不用響應點擊事件 boolean isMove = false; boolean isAnimatoring = false; //屏幕寬高 private int screenWidthPx; private int screenHeightPx; public MoveImageView(Context context) { this(context, null); } public MoveImageView(Context context, @Nullable AttributeSet attrs) { this(context, attrs, 0); } public MoveImageView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); screenWidthPx = getScreenWidthPx(getContext()); screenHeightPx = getScreenHeightPx(getContext()); } @Override public boolean onTouchEvent(MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: //動畫執行過程中，不響應一切操作， // 這里相當于不讓其走后面的MotionEvent.ACTION_MOVE:與MotionEvent.ACTION_UP: if (isAnimatoring) { return false; } lastX = event.getRawX(); lastY = event.getRawY(); left = getLeft(); top = getTop(); right = getRight(); bottom = getBottom(); break; case MotionEvent.ACTION_MOVE: isMove = true; float x = event.getRawX(); float y = event.getRawY(); int l = (int) (left + (x - lastX)); int t = (int) (top + (y - lastY)); int r = (int) (right + (x - lastX)); int b = (int) (bottom + (y - lastY)); layout(l, t, r, b); break; case MotionEvent.ACTION_UP: if (isMove) { //如果頂部拖出屏幕外面，回正 if (getTop() < 0) { layout(getLeft(), 0, getRight(), getHeight()); } //getBottom() 獲取到的是 控件底部到父容器頂部的距離，所以需要減去狀態欄的高度 int bottomHeight = screenHeightPx - getStatusBarHeight(getContext()); //如果底部拖出屏幕外面，回正 if (getBottom() > bottomHeight) { layout(getLeft(), bottomHeight-getHeight(), getRight(), bottomHeight); } isMove = false; startAnimation(); return true; } return super.onTouchEvent(event); } return super.onTouchEvent(event); } private void startAnimation() { isAnimatoring = true; //右邊距 int marinRight = DisplayUtils.dpToPx(20); int endValue = screenWidthPx - marinRight; ValueAnimator animator = ValueAnimator.ofInt(getRight(), endValue); animator.setDuration(Math.abs(endValue - getRight()) > 1000 ? 1000 : Math.abs(endValue - getRight())); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { int curValue = (int) animation.getAnimatedValue(); layout(curValue - getWidth(), getTop(), curValue, getHeight() + getTop()); } }); animator.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationStart(Animator animation) { } @Override public void onAnimationEnd(Animator animation) { isAnimatoring = false; animator.removeAllUpdateListeners(); animator.removeAllListeners(); } }); animator.start(); } /** * 獲取狀態欄高度 */ public static int getStatusBarHeight(Context context) { int result = 24; int resId = context.getResources().getIdentifier('status_bar_height', 'dimen', 'android'); if (resId > 0) { result = context.getResources().getDimensionPixelSize(resId); } else { result = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, result, Resources.getSystem().getDisplayMetrics()); } return result; } public static int getScreenWidthPx(Context context) { WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); DisplayMetrics dm = new DisplayMetrics(); if (windowManager != null) {// windowManager.getDefaultDisplay().getMetrics(dm); windowManager.getDefaultDisplay().getRealMetrics(dm); return dm.widthPixels; } return 0; } public static int getScreenHeightPx(Context context) { WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); DisplayMetrics dm = new DisplayMetrics(); if (windowManager != null) {// windowManager.getDefaultDisplay().getMetrics(dm); windowManager.getDefaultDisplay().getRealMetrics(dm); return dm.heightPixels; } return 0; }}

應用：

布局文件:

<?xml version='1.0' encoding='utf-8'?><RelativeLayout xmlns:android='http://schemas.android.com/apk/res/android' xmlns:app='http://schemas.android.com/apk/res-auto' xmlns:tools='http://schemas.android.com/tools' android:layout_width='match_parent' android:layout_height='match_parent' tools:context='.TestActivity'> <com.lingtao.ltvideo.widgets.MoveImageView android:layout_width='50dp' android: android:layout_height='50dp' android:layout_alignParentRight='true' android:layout_alignParentBottom='true' android:layout_marginBottom='100dp' android:layout_marginRight='20dp' android:src='http://www.b3g6.com/bcjs/9076.html#ff0000' /></RelativeLayout>

Activity:

public class TestActivity extends AppCompatActivity { private MoveImageView moveImageView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test2); moveImageView = ((MoveImageView) findViewById(R.id.MoveImageView)); moveImageView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(TestActivity.this, '點擊事件', Toast.LENGTH_SHORT).show(); } }); }}

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持好吧啦網。