Get the control in fragment in activity
getFragmentManager().findFragmentById(id).getView().findViewById(id)
HolderView item view processing
@Override
public View getView(int i, View convertView, ViewGroup viewGroup) {
HolderView holderView;
// Important to not just null check, but rather to a instanceof
// since we might get any subclass of view here.
if (convertView instanceof HolderView) {
holderView = (HolderView) convertView;
} else {
holderView = new HolderView(mContext);
}
holderView.bind(new Digit(i));
return holderView;
}
class HolderView extends FrameLayout{
//private Context ctx;
private View vroot;
public HolderView(Context context) {
super(context);
init(context);
}
public HolderView(Context context, AttributeSet attrs, View vroot) {
super(context, attrs);
init(context);
}
private void init(Context context){
vroot = LayoutInflater.from(context).inflate(R.layout.flyrecoder_item, this);
ButterKnife.bind(this, vroot);
}
void bindData(FlyRecordData model){
this.tv_fly_record_item_title.setText(model.itemTitle);
this.tv_fly_record_title_today.setText(model.todayData);
｝
｝Add Unified view Processing to Display Form Content
mLayoutInflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mViewGroup = (ViewGroup) activity
.findViewById(android.R.id.content);
mToastView = mLayoutInflater.inflate(R.layout.supertoast,
mViewGroup, false);
mMessageTextView = (TextView) mToastView
.findViewById(R.id.message_textview);Adding additional views to the head or bottom of the specified content view
private void setPoppyViewOnView(View view) {
LayoutParams lp = view.getLayoutParams();
ViewParent parent = view.getParent();
ViewGroup group = (ViewGroup)parent;
int index = group.indexOfChild(view);
final FrameLayout newContainer = new FrameLayout(mActivity);
group.removeView(view);
group.addView(newContainer, index, lp);
newContainer.addView(view);
final FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
layoutParams.gravity = mPoppyViewPosition == PoppyViewPosition.BOTTOM ? Gravity.BOTTOM : Gravity.TOP;
newContainer.addView(mPoppyView, layoutParams);
group.invalidate();
}
public enum PoppyViewPosition {
TOP, BOTTOM
};
private View mPoppyView;Set up picture overlay layer (uneven effect)
Drawable[] array = new Drawable[2];
array[0] = getResources().getDrawable(R.drawable.qq_girl);
array[1] = getResources().getDrawable(R.drawable.qq_boy);
LayerDrawable la = new LayerDrawable(array);
// The first parameter is the index number of the layer, and the last four parameters are left, top, right and bottom.
la.setLayerInset(0, 0, 0, 0, 0);
la.setLayerInset(1, 18, 35, 180, 76);
image.setImageDrawable(la);
It can also be implemented in xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="@drawable/compassbackground" />
<item android:drawable="@drawable/compass_text" />
</layer-list>
Expanding the effective click area of the control (for example, imageview, which is insensitive when clicking on a smaller image) requires scaleType properties to be set here
Improvement:
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:src="@drawable/edit"
android:scaleType="centerInside"/>
Here we set the size of the road ImageView, which is the effective click area of ImageViwe and can change the size according to your own situation.
Note: To use src, you can't use background or the image will be stretched
When touch ing a point on the screen, determine whether the click is in a widget control:
Rect mTouchRect = new Rect();
private boolean isTouchedView(View view, float x, float y) {
view.getHitRect(mTouchRect);
// by taping top or bottom padding, the list performs on click on a border item.
// we don't add top padding here to keep behavior consistent.
// mTouchRect.top += mTranslateY;
// mTouchRect.bottom += mTranslateY + getPaddingTop();
// mTouchRect.left += getPaddingLeft();
// mTouchRect.right -= getPaddingRight();
return mTouchRect.contains((int)x, (int)y);
}activity sets the background transparent getWindow (). setBackgroundDrawable (new ColorDrawable (android. graphics. Color. TRANSPARENT);.
view Background Transparency Settings
android:background
The following two methods set the background transparent: "@android: color/transparent" and "@null"
GirdView,ListView sets divide transparency, gridView.setSelector(new ColorDrawable(Color.TRANSPARENT));
Hide the title bar and the status bar android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
Set a transparent background, modify the AndroidManifest.xml file, and add the following attributes to the corresponding Activity:
android:theme="@android:style/Theme.Translucent"
Using the system background as the background of the application, add window flags when onCreate:
getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER);
android:theme="@android:style/Theme.Dialog"
Setting ctx at dialog level does not depend on Activity
AlertDialog mDialog=dialog.create();
MDialog. getWindow (). setType (Windows Manager. LayoutParams. TYPE_SYSTEM_ALERT); //Set as System-Level Warning, Key
<activity android:windowSoftInputMode="stateVisible|adjustResize" . . . >
The Activity main window is always resized to allow room for a soft keyboard
// Forced to be horizontal screen
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
<activity android:name=".HandlerActivity" android:screenOrientation="landscape"/>
// Forced to be vertical screen
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
<activity android:name=".HandlerActivity" android:screenOrientation="portrait"/>
Setting properties in AndroidManifest.xml prohibits recreating Activity and adds screen switching listeners.
<activity android:name=".HandlerActivity"
sdk<3.2 android:configChanges="orientation|keyboardHidden"/>
dk>3.2 android:configChanges="orientation|screenSize"
handler cleans up all message content: mHandler. removeCallbacks AndMessages (null);
// Get the position of View in the window/screen
TextView tv= (TextView) findViewById(R.id.tv);
int loc[]=new int[2];
tv.getLocationInWindow(loc);
Log.e("TAG",loc[0]+" "+loc[1]);
Get the corresponding ID according to the widget resource name:
int resID = getResources().getIdentifier("widget_id", "id", getPackageName());
View addButton = findViewById(resID);
The isShown() method in View was previously judged by view.getVisibility() == View.VISIBLE, but it is different from this function.
That is, isShown() returns TRUE only if the view itself and all its parent containers are visible.
Normally, we call if(view.getVisibility() == View.VISIBLE) to judge the visibility of the view itself rather than the parent container.
Getting view s directly does not require mandatory transformation
public static <T> T $(View vroot,int viewID) {
return (T) vroot.findViewById(viewID);
}
Use:
Button takePicture = Utils.$(v, R.id.start_camera);
Open the test program by dialing the keyboard:
Registration corresponds to Receiver
<receiver android:name=".receiver.DiagnoserReceiver">
<intent-filter>
<action android:name="android.provider.Telephony.SECRET_CODE"/>
<data android:scheme="android_secret_code" android:host="111222"/>
</intent-filter>
</receiver>
Receiving processing:
public class DiagnoserReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
if ("android.provider.Telephony.SECRET_CODE".equals(intent.getAction())) {
Intent i = new Intent(Intent.ACTION_MAIN);
i.setClass(context, Diagnoser.class);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
}
}
Dial-up dial can be opened by entering ** 111222 **
Drawing sector progress loading
public void draw(Canvas canvas) {
if (getHideWhenZero() && mLevel == 0) {
return;
}
drawBar(canvas, maxLevel, getBackgroundColor());
drawBar(canvas, mLevel, getColor());
}
private void drawBar(Canvas canvas, int level, int color) {
Rect bounds = getBounds();
RectF rectF = new RectF((float) (bounds.right * .4), (float) (bounds.bottom * .4),
(float) (bounds.right * .6), (float) (bounds.bottom * .6));
mPaint.setColor(color);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(6);
if (level != 0)
canvas.drawArc(rectF, 0, (float) (level * 360 / maxLevel), false, mPaint);
}Screen interception
/**
* Get the current screen capture, including the status bar
*/
public static Bitmap snapShotWithStatusBar(Activity activity){
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bmp = view.getDrawingCache();
int width = getScreenWidth(activity);
int height = getScreenHeight(activity);
Bitmap bp = null;
bp = Bitmap.createBitmap(bmp, 0, 0, width, height);
view.destroyDrawingCache();
return bp;
}
/**
* Get the current screen shot, excluding the status bar
*
*/
public static Bitmap snapShotWithoutStatusBar(Activity activity){
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bmp = view.getDrawingCache();
Rect frame = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int statusBarHeight = frame.top;
int width = getScreenWidth(activity);
int height = getScreenHeight(activity);
Bitmap bp = null;
bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height
- statusBarHeight);
view.destroyDrawingCache();
return bp;
}Bitmap size calculation
static int getBitmapBytes(Bitmap bitmap) {
int result;
if (SDK_INT >= HONEYCOMB_MR1) {
result = BitmapHoneycombMR1.getByteCount(bitmap);
} else {
result = bitmap.getRowBytes() * bitmap.getHeight();
}
if (result < 0) {
throw new IllegalStateException("Negative size: " + bitmap);
}
return result;
}Save and restore the current location of ListView
private void saveCurrentPosition() {
if (mListView != null) {
int position = mListView.getFirstVisiblePosition();
View v = mListView.getChildAt(0);
int top = (v == null) ? 0 : v.getTop();
//Save position and top
}
}
private void restorePosition() {
if (mFolder != null && mListView != null) {
int position = 0;//Remove saved data
int top = 0;//Remove saved data
mListView.setSelectionFromTop(position, top);
}
}Help, about, tips on authors, HELP, etc. dialog page
//Method 1:
AlertDialog ad = new AlertDialog.Builder(SettingPreference.this)
.setTitle(R.string.about_dlg_title)
.setMessage(R.string.about_dlg_message)
.setPositiveButton(getText(R.string.ok), null).create();
ad.show();
//Add Link Function
Linkify.addLinks((TextView) ad.findViewById(android.R.id.message),
Linkify.ALL);
//Method two:
//Designing an AboutDialog class to inherit from AlertDialog
public class AboutDialog extends AlertDialog {
public AboutDialog(Context context) {
super(context);
final View view = getLayoutInflater().inflate(R.layout.about,
null);
setButton(context.getText(R.string.close), (OnClickListener) null);
setIcon(R.drawable.icon_about);
setTitle("Program version v1.0.0" );
setView(view);
} Layout file about.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="wrap_content">
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="fill_parent">
<TextView android:layout_height="fill_parent"
android:layout_width="fill_parent" android:text="@string/help_dialog_text"
android:padding="6dip" android:textColor="#FFFFFF" />
</ScrollView>
</FrameLayout>