【eoe教程】针对TV优化Android应用界面布局

1
2
3
4
5
6
7
8
9
10
11
12

<RelativeLayout android:layout_width="fill_parent"
android:layout_height="fill_parent">
<fragment
android:id="@+id/leftsidecontrols"
android:layout_width="0dip"
android:layout_marginLeft="5dip"
android:layout_height="match_parent" />
<GridView
android:id="@+id/gridview"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>

1

LeftNavBar bar = (LeftNavBarService.instance()).getLeftNavBar(this);

1
2
3
4
5
6
7

<TextView
android:id="@+id/atext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:singleLine="true"
android:textAppearance="?android:attr/textAppearanceMedium"/>

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

// Get the source image's dimensions
BitmapFactory.Options options = new BitmapFactory.Options();
// This does not download the actual image, just downloads headers.
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(IMAGE_FILE_URL, options);
// The actual width of the image.
int srcWidth = options.outWidth;
// The actual height of the image.
int srcHeight = options.outHeight;
// Only scale if the source is bigger than the width of the destination view.
if(desiredWidth > srcWidth)
desiredWidth = srcWidth;
// Calculate the correct inSampleSize/scale value. This helps reduce memory use. It should be a power of 2.
int inSampleSize = 1;
while(srcWidth / 2 > desiredWidth){
srcWidth /= 2;
srcHeight /= 2;
inSampleSize * = 2;
}
float desiredScale = (float) desiredWidth / srcWidth;
// Decode with inSampleSize
options.inJustDecodeBounds = false;
options.inDither = false;
options.inSampleSize = inSampleSize;
options.inScaled = false;
// Ensures the image stays as a 32-bit ARGB_8888 image.
// This preserves image quality.
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap sampledSrcBitmap = BitmapFactory.decodeFile(IMAGE_FILE_URL, options);
// Resize
Matrix matrix = new Matrix();
matrix.postScale(desiredScale, desiredScale);
Bitmap scaledBitmap = Bitmap.createBitmap(sampledSrcBitmap, 0, 0,
sampledSrcBitmap.getWidth(), sampledSrcBitmap.getHeight(), matrix, true);
sampledSrcBitmap = null;
// Save
FileOutputStream out = new FileOutputStream(LOCAL_PATH_TO_STORE_IMAGE);
scaledBitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
scaledBitmap = null;