Forty-four, Android: layout_weight

1. You can specify the filling weight for the linearlayout control. This allows its contained controls to fill the remaining space on the screen. This also avoids the congestion of all controls, but allows them to zoom in and fill in all spaces. The

45. android camera

1. Questions about previewing at 90 degrees of horizontal and vertical differenceCause Analysis After verification and experiment, it can be confirmed that the SDK provided by Android (android. hardware. the portrait screen (portrait layout) cannot

46. Bitmap in android

The following formats are supported in the Android SDK: png, jpg, gif, and bmp. 1. Create a Bitmap BitmapFactory.1) images in resourcesUse BitmapFactory to obtain bitmapBitmap bmp = BitmapFactory. decodeResource (this. getResources (), R. drawable.

. The Android mobile phone photo function is called.

I. main. xml layout File Ii. Core code Package com. ljq. test;Import java. io. ByteArrayOutputStream;Import java. io. File;Import android. app. Activity;Import android. content. Intent;Import android. graphics. Bitmap;Import Uri;

Android-based animation effect Programming

This article is from if the basic knowledge is correct, you can copy it to facilitate searching. Animation effect programming basics-Android AnimationAnimation typeAndroid animation consists of four typesIn

Android menu 2-context menu

The context menu is different from the option menu. The option menu serves the Activity, while the context menu is registered to a View object. If a View object registers a context menu, you can press and hold the View object to call out the context

Android List dialog box

Main. xml layout File Android: orientation = "vertical" android: layout_width = "fill_parent"Android: layout_height = "fill_parent">Android: id = "@ + id/editText"Android: layout_width = "fill_parent"Android: layout_height = "wrap_content"Android:

Android radio button dialog box

Main. xml layout File Android: orientation = "vertical" android: layout_width = "fill_parent"Android: layout_height = "fill_parent">Android: id = "@ + id/editText"Android: layout_width = "fill_parent"Android: layout_height = "wrap_content"Android:

Normal dialog box for Android

Main. xml layout File Android: orientation = "vertical" android: layout_width = "fill_parent"Android: layout_height = "fill_parent">Android: id = "@ + id/editText"Android: layout_width = "fill_parent"Android: layout_height = "wrap_content"Android:

Difference between gravity and layout_gravity in Android

Android: gravity: sets the content location on the control. Android: layout_gravity: Set the display position of the control relative to the parent control. See the following code snippet. Android: orientation = "vertical"Android: layout_width = "

Android Intent Exploration

An Android application consists of four components (Activity, Broadcast, Service, and ContentProvider), which are independent, they can call and coordinate each other to form a real Android Application. The communication between these components is

Android control-ToggleButton

The ToggleButton status can only be selected or not selected, and different display text needs to be set for different states. The following uses ToggleButton: Directory structure Main. xml layout File Android: orientation = "vertical"Android:

Android control-AnalogClock and DigitalClock

Clock controls include AnalogClock and DigitalClock, which are responsible for displaying the clock. The difference is that the AnalogClock control displays the analog clock and only the hour and minute hands, while the DigitalClock displays the

Exploration of Android control CheckBox and RadioButton

The CheckBox and RadioButton controls only have the select and unselected states. The difference is that RadioButton is a single-choice button and needs to be compiled into a RadioGroup. Only one button in a RadioGroup can be selected at the same

Exploration of DatePicker and TimePicker in Android Control

1. DatePicker inherits from the FrameLayout class. The date Selection Control provides users with date data including year, month, and day, and allows users to modify the data. To capture Data Events in the user's date Selection control, you need to

Exploring ScrollView of Android controls

ScrollView a rolling view is a view that needs to be displayed by scrolling and jumping when there is a lot of content that cannot be displayed on the screen. ScrollView only supports vertical scrolling. The following are examples Main. xml layout

Android control: ListView 1

In android development, ListView is a commonly used component that displays specific content in the form of a list and can be automatically displayed based on the length of data. Main. xml layout File android:layout_width="fill_parent"

Android control: Exploring AutoCompleteTextView and MultiAutoCompleteTextView

Android provides two types of smart input boxes: AutoCompleteTextView and MultiAutoCompleteTextView. Their functions are roughly the same. The display effect is the same as that in Google search. When you enter some characters in the search box (at

Handle class usage in android

If we directly put the processing function in OnCreate or OnStart of Activity when processing download or other tasks that require long execution, the entire Activity will not respond during execution, if the time is too long, the program will be

Exploration of TabHost in Android Control

The following uses TabHost to implement the android tab. Main. xml layout File Android: layout_width = "fill_parent"Android: layout_height = "fill_parent">Android: layout_width = "fill_parent"Android: layout_height = "fill_parent"Android: gravity = "

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