public WindowManager.LayoutParams wmParams;
public WindowManager getWm() {
return wm;
}
public void setWm(WindowManager wm) {
this.wm = wm;
}
public WindowManager.LayoutParams getWmParams() {
return wmParams;
}
public void setWmParams(WindowManager.LayoutParams wmParams) {
this.wmParams = wmParams;
this.wmParams.x = 0;//screenWidth/2; // The window is attached to the right first
}
public SmallWindowView(Context context) {
this(context, null);
}
public SmallWindowView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public SmallWindowView(final Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
statusHeight = getStatusHeight(context);
DisplayMetrics dm = getResources().getDisplayMetrics();
screenHeight = dm.heightPixels;
screenWidth = dm.widthPixels;
addOnAttachStateChangeListener(new OnAttachStateChangeListener() {
@Override
public void onViewAttachedToWindow(View v) {
//In response to the button inside the window, click jump to open a new page
findViewById(R.id.btn).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(context, SecondActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
}
});
removeOnAttachStateChangeListener(this);
}
@Override
public void onViewDetachedFromWindow(View v) {
}
});
}
/**
* Gets the height of the status bar
* @param context
* @return
*/
public static int getStatusHeight(Context context) {
int statusHeight = -1;
try {
Class clazz = Class.forName("com.android.internal.R$dimen");
Object object = clazz.newInstance();
int height = Integer.parseInt(clazz.getField("status_bar_height")
.get(object).toString());
statusHeight = context.getResources().getDimensionPixelSize(height);
} catch (Exception e) {
e.printStackTrace();
}
return statusHeight;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
// Relative x coordinate and relative Y coordinate of touch point in View
//mTouchStartX = event.getX();
//mTouchStartY = event.getY();
// x-coordinate and y-coordinate of the touch point relative to the screen
mLastRawX = event.getRawX();
mLastRawY = event.getRawY() - statusHeight;
Log.e(TAG, "startX = " + mLastRawX + " startY = " + mLastRawY);
break;
case MotionEvent.ACTION_MOVE:
updateViewPosition(event.getRawX(), event.getRawY());
mLastRawX = event.getRawX();
mLastRawY = event.getRawY();
break;
case MotionEvent.ACTION_UP:
break;
default:
break;
}
return true;
}
/** Update floating window position parameters */
private void updateViewPosition(float x, float y) {
wmParams.gravity = Gravity.NO_GRAVITY;
//Calculate movement distance
int dx = (int) (x - mLastRawX);
int dy = (int) (y - mLastRawY);
Log.e(TAG, "updateViewPosition: dx = " + dx + " dy = " + dy);
//The default is to start with the screen center point as (0,0)
wmParams.x += dx;
wmParams.y += dy;
Log.e(TAG, "updateViewPosition: wmParams.x = " + wmParams.x + " wmParams.y = " + wmParams.y);
wm.updateViewLayout(this, wmParams);
}
}
Define a base class Activity Use and process permission applications:
public class BaseActivity extends AppCompatActivity {
private WindowManager wm;
private SmallWindowView windowView;
private WindowManager.LayoutParams mLayoutParams;
private int OVERLAY_PERMISSION_REQ_CODE = 2;
private boolean isRange = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
wm = ((App)getApplication()).getWindowManager();
windowView = ((App)getApplication()).getWindowView();
mLayoutParams = ((App)getApplication()).getLayoutParams();
}
public void alertWindow() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { // Above 7.0, it is necessary to use boot to set the floating permission to open the window
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { // type above 8.0 needs to be set to this
mLayoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
}
requestDrawOverLays();
} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { // 6.0 dynamic application
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.SYSTEM_ALERT_WINDOW}, 1);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
if (wm != null && windowView.getWm() == null) {
wm.addView(windowView, mLayoutParams);
}
} else {
Toast.makeText(this, "Permission application failed", Toast.LENGTH_SHORT).show();
}
}
private int[] location = new int[2]; // Small window position coordinates
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
isRange = calcPointRange(event);
}
if (isRange) {
windowView.dispatchTouchEvent(event);
}
return super.onTouchEvent(event);
}
/**
* Calculate whether the coordinates of the current click event are in the small window
* @param event
* @return
*/
private boolean calcPointRange(MotionEvent event) {
windowView.getLocationOnScreen(location);
int width = windowView.getMeasuredWidth();
int height = windowView.getMeasuredHeight();
float curX = event.getRawX();
float curY = event.getRawY();
if (curX >= location[0] && curX <= location[0] + width && curY >= location[1] && curY <= location[1] + height) {
return true;
}
return false;
last
In fact, there are so many knowledge points about Android development. There are still so many things to ask during the interview. So there is no other trick in the interview. It only depends on how well you are prepared for these knowledge points. So, when you go out for an interview, just look at the stage you have reviewed.
For the high-frequency interview questions of Baidu, Tencent, Netease, byte beat, Ali and other companies in 2021 shared above, the bloggers also sorted these technical points into videos and PDF s (actually spent a lot more energy than expected), including knowledge context + many details. Due to the limited space, the above is only shown to you in the form of pictures.
[Android mind map (skill tree)]
Knowledge system? Here is also the thought brain map of Android advanced learning, for your reference.
[Android advanced architecture video learning resources]
Just fine.
For the high-frequency interview questions of Baidu, Tencent, Netease, byte beat, Ali and other companies in 2021 shared above, the bloggers also sorted these technical points into videos and PDF s (actually spent a lot more energy than expected), including knowledge context + many details. Due to the limited space, the above is only shown to you in the form of pictures.
[Android mind map (skill tree)]
Knowledge system? Here is also the thought brain map of Android advanced learning, for your reference.
[external chain picture transferring... (img-qJaRb6pd-1630386006517)]
[Android advanced architecture video learning resources]
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