如何将FloatingActionButton＆＃34;置于顶部＆＃34;一个SurfaceView？
在使用这样的代码之前我使用了FloatingActionButton's：
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
我的代码： - 开展活动 -
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle tmpExtras = this.getIntent().getExtras();
if(tmpExtras != null) {
Log.d("Hello", "We got fleet");
fleet1 = tmpExtras.getParcelable("fleet1");
fleet2 = tmpExtras.getParcelable("fleet2");
}
AnimationGenerator = new surfaceview_take_animation(this, fleet1, fleet2);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
Window window = getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
window.setStatusBarColor(Color.BLACK);
}
// setContentView(AnimationGenerator);
//setContentView(new surfaceview_take_animation(this, fleet1, fleet2));
setContentView(R.layout.take_turn);
LinearLayout surface = (LinearLayout)findViewById(R.id.GameSurface);
surface.addView(new surfaceview_take_animation(this,fleet1,fleet2));
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fabTakeTurn);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
-SurfaceView-
public class surfaceview_take_animation extends SurfaceView implements SurfaceHolder.Callback{
final static String TAG = "CanvasView";
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
ScaleGestureDetector mScaleDetector;
GestureDetector mGestures;
int mode = Constants.INTERACTION_MODE_NONE;
Matrix mMatrix = new Matrix();
float mScaleFactor = 1.0f;
float mTouchX;
float mTouchY;
float mScaleTouchX;
float mScaleTouchY;
float mTouchBackupX;
float mTouchBackupY;
float mTouchDownX;
float mTouchDownY;
Matrix drawMatrix = new Matrix();
Rect canvasBox = new Rect();
Rect boundingBox = new Rect();
Rect gameBox = new Rect();
Bitmap lampsBitmap[] = new Bitmap[12];
Drawable fab;
float lampsX[] = new float[12];
float lampsY[] = new float[12];
float lampsScreenX[] = new float[12];
float lampsScreenY[] = new float[12];
boolean selections[] = new boolean[12];
boolean mMultiSelect = false;
int gameMode = Constants.TAKE_TURN_NO_SELECTION;
String imagename="";
Canvas canvas;
Resources res;
int arenaX = 1080;
int arenaY = 1920;
Matrix m = new Matrix();
int mActionBarSize = 0;
data_type_parceable_fleet fleet1, fleet2;
public surfaceview_take_animation(Context context, data_type_parceable_fleet tmpFleet1, data_type_parceable_fleet tmpFleet2) {
super(context);
// we need to get a call for onSurfaceCreated
SurfaceHolder sh = this.getHolder();
sh.addCallback(this);
if(tmpFleet1 != null) {
Log.d("SMURF", "made it here");
fleet1 = tmpFleet1;
fleet2 = tmpFleet2;
}
// for zooming (scaling) the view with two fingers
mScaleDetector = new ScaleGestureDetector(context, new ScaleListener());
res = this.getResources();
canvas = sh.lockCanvas();
paint.setColor(Color.GREEN);
paint.setStrokeWidth((float) 5);
paint.setStyle(Paint.Style.STROKE);
for(int i=0; i<12; i++) {
//ultimately will be a class switcher
switch (i) {
case 0://Green
imagename = "class_green_red_128";
break;
case 6://Green
imagename = "class_green_purple_128";
break;
case 1://Red
imagename = "class_red_128";
break;
case 7://Red
imagename = "class_red_128";
break;
case 2://Blue
imagename = "class_blue_128";
break;
case 8://Blue
imagename = "class_blue_128";
break;
case 3://Yellow
imagename = "class_yellow_128";
break;
case 9://Yellow
imagename = "class_yellow_128";
break;
case 4://Orange
imagename = "class_orange_128";
break;
case 10://Orange
imagename = "class_orange_128";
break;
case 5://Purple
imagename = "class_purple_128";
break;
case 11://Purple
imagename = "class_purple_128";
break;
}
lampsX[i] = (i * 50) + 85; //(lampsBitmap[i].getWidth()/2);
lampsY[i] = (i * 80) + 85; //(lampsBitmap[i].getHeight()/2);
lampsScreenX[i] = lampsX[i];
lampsScreenY[i] = lampsY[i];
int resID = res.getIdentifier(imagename, "mipmap", MainActivity.PACKAGE_NAME);
lampsBitmap[i] = BitmapFactory.decodeResource(getResources(), resID);
final TypedArray styledAttributes = getContext().getTheme().obtainStyledAttributes(
new int[] { android.R.attr.actionBarSize });
mActionBarSize = (int) styledAttributes.getDimension(0,0);
}
imagename = "ic_dialog_email";
setFocusable(true);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
mScaleDetector.onTouchEvent(event);
//mGestures.onTouchEvent(event);
boolean tmpFound;
if (!this.mScaleDetector.isInProgress()) {
final float x = event.getX();
final float y = event.getY();
final float diffX;
final float diffY;
switch (event.getAction()) {
case MotionEvent.ACTION_UP:
mode = Constants.INTERACTION_MODE_NONE;
break;
case MotionEvent.ACTION_DOWN:
mTouchDownX = x;
mTouchDownY = y;
tmpFound = determineLampselection((mTouchDownX / mScaleFactor) + canvasBox.left,
(mTouchDownY / mScaleFactor) + canvasBox.top);
mTouchBackupX = mTouchX;
mTouchBackupY = mTouchY;
if (!tmpFound) { //allow move if no selection
// pan/move started
mode = Constants.INTERACTION_MODE_PAN;
} else {
mode = Constants.INTERACTION_MODE_NONE;
}
CalculateMatrix(true);
break;
case MotionEvent.ACTION_MOVE:
if (mode == Constants.INTERACTION_MODE_PAN) {
if (x > mTouchDownX) {
diffX = x - mTouchDownX;
set_mTouchX(mTouchBackupX + (diffX));
} else {
diffX = mTouchDownX - x;
set_mTouchX(mTouchBackupX - (diffX));
}
if (y > mTouchDownY) {
diffY = y - mTouchDownY;
set_mTouchY(mTouchBackupY + (diffY));
} else {
diffY = mTouchDownY - y;
set_mTouchY(mTouchBackupY - (diffY));
}
CalculateMatrix(true);
}
break;
}
}
return true;
}
@Override
public void onDraw(Canvas canvas) {
float tmpLeftMost = 0;
float tmpRightMost = 0;
float tmpTopMost = 0;
float tmpBottomMost = 0;
canvas.drawColor(Color.BLACK);
canvas.translate(mTouchX, mTouchY);
canvas.scale(mScaleFactor, mScaleFactor, mScaleTouchX, mScaleTouchY);
for(int i=0; i<12; i++) {
if(i==0){
tmpLeftMost = lampsScreenX[i];
tmpRightMost = lampsScreenX[i];
tmpTopMost = lampsScreenY[i];
tmpBottomMost = lampsScreenY[i];
}
canvas.save();
drawMatrix.reset();
drawMatrix.postTranslate(lampsScreenX[i], lampsScreenY[i]);
if(tmpLeftMost > lampsScreenX[i]){
tmpLeftMost = lampsScreenX[i];
}
if(tmpRightMost < (lampsScreenX[i] +lampsBitmap[i].getWidth())){
tmpRightMost = lampsScreenX[i]+ lampsBitmap[i].getWidth();
}
if(tmpTopMost > (lampsScreenY[i])){
tmpTopMost = lampsScreenY[i];
}
if(tmpBottomMost < (lampsScreenY[i] + lampsBitmap[i].getHeight())){
tmpBottomMost = lampsScreenY[i] + lampsBitmap[i].getHeight();
}
canvas.drawBitmap(lampsBitmap[i], drawMatrix, paint);
if(gameMode == Constants.TAKE_TURN_SINGLE_SELECTION){
if(selections[i]) {
boundingBox.set((int) lampsScreenX[i], (int) lampsScreenY[i], (int) lampsScreenX[i] + lampsBitmap[i].getWidth(), (int) lampsScreenY[i] + lampsBitmap[i].getHeight());
canvas.drawRect(boundingBox, paint);
}
}
canvas.restore();
}
canvasBox = canvas.getClipBounds();
gameBox.set((int) (tmpLeftMost - 200*mScaleFactor), (int) (tmpTopMost - 200*mScaleFactor) , (int) (tmpRightMost + 200*mScaleFactor),(int) (tmpBottomMost + 200*mScaleFactor));
canvas.drawRect(gameBox, paint);
}
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
}
@Override
public void surfaceCreated(SurfaceHolder arg0) {
// otherwise onDraw(Canvas) won't be called
this.setWillNotDraw(false);
}
@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
}
void CalculateMatrix(boolean invalidate) {
if (invalidate)
invalidate(); // re-draw
}
private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
public ScaleListener() {
}
@Override
public boolean onScaleBegin(ScaleGestureDetector detector) {
mode = Constants.INTERACTION_MODE_ZOOM;
return true;
}
@Override
public void onScaleEnd(ScaleGestureDetector detector) {
mode = Constants.INTERACTION_MODE_NONE;
super.onScaleEnd(detector);
}
@Override
public boolean onScale(ScaleGestureDetector detector) {
float scale = detector.getScaleFactor();
if (mode != Constants.INTERACTION_MODE_ZOOM)
return true;
mScaleFactor *= scale;
mScaleFactor = Math.max(0.5f, Math.min(mScaleFactor, 3.0f));
mScaleTouchX = (detector.getFocusX()/mScaleFactor) + canvasBox.left;
mScaleTouchY = (detector.getFocusY()/mScaleFactor) + canvasBox.top;
CalculateMatrix(true);
return true;
}
}
private boolean determineLampselection(float tmpDownX, float tmpDownY){
float tmpX, tmpY, tmpHyp;
float tmpShipX, tmpShipY;
float tmpClosest = 0;
boolean tmpFoundOne = false;
mMultiSelect = false;
for(int i =0; i<12; i++) {
selections[i] = false; //reset selections
tmpShipX = lampsX[i] + lampsBitmap[i].getWidth()/2;
tmpShipY = lampsY[i] + lampsBitmap[i].getHeight()/2;
if(tmpDownX < tmpShipX){
tmpX = tmpShipX - tmpDownX;
}else{
tmpX = tmpDownX - tmpShipX;
}
if(tmpDownY < tmpShipY){
tmpY = tmpShipY - tmpDownY;
}else{
tmpY = tmpDownY - tmpShipY;
}
tmpHyp = (float) Math.sqrt( (double) (tmpX*tmpX) + (double) (tmpY*tmpY) );
if(tmpHyp < 60){
selections[i] = true;
if(!tmpFoundOne) { //is there already a selection
tmpFoundOne = true;
gameMode = Constants.TAKE_TURN_SINGLE_SELECTION;
}else{
mMultiSelect = true;
gameMode = Constants.TAKE_TURN_MULTI_SELECTION;
}
}
}
return tmpFoundOne;
}
private void set_mTouchX(float tmpX){
mTouchX = tmpX;
}
private void set_mTouchY(float tmpY){
mTouchY = tmpY;
}
}
-layout xml for take_turn -
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:id="@+id/GameSurface"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" />
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="@dimen/margin_small"
android:layout_marginTop="@dimen/margin_small"
android:clickable="true"
app:fabSize="mini"
app:srcCompat="@mipmap/drone_squadron_64"
android:id="@+id/fabTakeTurn"
app:backgroundTint="@android:color/holo_blue_bright"
app:elevation="7dp" />
</LinearLayout>
答案 0 :(得分：2)
试试这个：
surfaceView.setZOrderOnTop(false);
答案 1 :(得分：1)
我得到了它的工作。父布局需要是协调器布局。
谢谢！