drawable

问题 In order to create a tile management system I have a pack of image in my res/drawable directory. How to load that ressource dynamically ? like : F_16.0_0_112.jpg. ("F_"+zoom"+"._"+XCoord+"_"+YCoord".jpg") Is there a fonction like getDrawable(String) ? 回答1: You can get a drawable using its name by: int id = getResources().getIdentifier("name_of_resource", "id", getPackageName()); 回答2: You can get this using reflection (dont forget to import java.lang.reflect.Field) /** * For example calling

问题 I have imageView inside a relative layout. And when i create the activity i run thread to grap bitmap from the internet and set the imageView. What i want is to resize the bitmap to scale based on relative view size while keeping the aspect ratio. The code for resizing the image is working but what i do is i get the relative view size by calling myRelativeView.getWidth() & myRelativeView.getHeight() and i feel that i should not do that because the docs say it could return 0. So what is the

问题 I meet a problem: I have images file having different sizes. (hdpi, xhdpi, xxhdpi, xxxhdpi) When I used the image files in the in the hdpi,xhdpi,xxhdpi devices, it's good. But when the device is xxxhdpi, the resolutions of the image files was became smaller. I don't know why it had happened. For example: I have 2 devices, one's resolution is xxhdpi, another one is xxxhdpi. And I have 2 image files, one is put in the folder "drawable-xxhdpi", it's resolution is 1080x1920. Another one is put in

问题 I want to check background of my imageview and do sth if it equals to some drawable in my drawable folder. How can I do that? I have try this code but no answer: layoutRoot.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { if (view.getBackground() == R.drawable.grid_single_bg_selected) { //Do sth } } }); 回答1: When you set the background drawable also do set a tag to the imageview imageView.setTag(R.drawable.demo); And then compare if (((Integer) imageView

问题 I need to draw a Bitmap for my new Android Application. Since my content view is set to a Game-Panel class I've created. I want to display images through Bitmap. Just because its more convenient, and easier to do then anything else. From what I've gathered from researching, Nine Patch images (.9.png) are used in android to scale more properly then regular Drawable images. It also says "This can be used for scaling properly in backgrounds. For example a regular button background...". If Nine

问题 Depending on the situation of course, I normally have a drawable for each density my app supports and the right density drawable is used when I use an id reference of some drawable. But I'm looking to access a drawable from a specific density (for example, ldpi) no matter the density running on the device. But I want this on a specific situation, not everywhere, that would defeat the purpose of having multiple drawables for each density. Is this possible? 回答1: I dont know that it is possible

问题 I did this to "inflate" the logo at the toolbar: toolbar.setNavigationIcon(R.drawable.navigationIcon); toolbar.getNavigationIcon().setTint(Color.BLUE); toolbar.setLogo(R.drawable.logo); toolbar.getLogo().methodForFloatRightHere(); Does there exist some simple method that doesn't use "inflate" on a view? 回答1: You can add custom views to a toolbar. The key is the android:layout_gravity="center" on the logo ImageView . <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout

问题 Currently I am using this code to add color: ShapeDrawable drawable = new ShapeDrawable(new OvalShape()); drawable.getPaint().setColor(color); Now I need to apply some gradient colors to it along with stroke(like border with different color). I am setting this as background to button. Here is what I am expecting, I need to do it programmatically. 回答1: Add a RadialGradient to your drawable like this: Shader shader = new RadialGradient(x, y, radius, color0, color1, Shader.TileMode.REPEAT);

问题 I am trying to toggle my button's background drawables, so that when the user clicks the button its background is changed and when the user clicks the button again its background returns to defaul. Here is my code: public void Favorites(View V) { Button star = (Button) findViewById(R.id.buttonStar); if(star.getBackground().equals(R.drawable.btn_star_off)) { star.setBackgroundResource(R.drawable.btn_star_on); } else { star.setBackgroundResource(R.drawable.btn_star_off); } } I am pretty sure

问题 ALL, As suggested here I need to make a drawable out of my bitmap. But when I tried to use: Drawable d = new Drawable( my_bmp); it shows that this constructor is deprecated in favour of: Drawable(Bitmap bmp, int resourceId) How else I can make a drawable out of bitmap? Thank you. 回答1: You can use Drawable d = new BitmapDrawable(getResources(), my_bmp); A Drawable that wraps a bitmap and can be tiled, stretched, or aligned. You can create a BitmapDrawable from a file path, an input stream,