Save Restore Array List Android Example
AD MOB
int[] mArrayOfInt;
String[] mArrayOfString;
List<String> mList;
public void saveState(Bundle map)
{
map.putIntArray("mArrayOfInt", mArrayOfInt);
map.putStringArray("mArrayOfString", mArrayOfString);
map.putStringArrayList("mList", mList);
}
public void restoreState(Bundle map)
{
mArrayOfInt= map.getIntArray("mArrayOfInt");
mArrayOfString = map.getStringArray("mArrayOfString");
mList = map.getStringArrayList("mList");
}
397LW NO topic_id
AD
Další témata ....(Topics)
BufferedWriter, FileWriter, write, close MODE_APPEND Java and Android example
Write to file Android example
Write to file Java example
Write to file Android example
try {
String MYFILE = "my_file";
String strText = "My text";
// MODE_APPEND, MODE_WORLD_READABLE, MODE_WORLD_WRITEABLE
// create new file or rewrite existing
FileOutputStream fos = openFileOutput(MYFILE, getApplicationContext().MODE_PRIVATE);
// append to file
FileOutputStream fos = openFileOutput(MYFILE, getApplicationContext().MODE_APPEND);
fos.write(strText.getBytes());
fos.close();
} catch (IOException e) {
e.toString();
}
Write to file Java example
try {
// new file
BufferedWriter out = new BufferedWriter(
new FileWriter("outfilename"));
// append text
BufferedWriter out = new BufferedWriter(new FileWriter("outfilename", true));
out.write("some text");
out.close();
} catch (IOException e) {
e.toString();
}
Issue:
ActivityThread: Failed to find provider
Try check this authority tags if they are all the same:
(com.yourdomen.yourproject.YourContentProviderClass replace your path to YourContentProviderClass)
res/xml/serchable.xml
Tag searchable
AndroidManifest.xml
Tag provider
ActivityThread: Failed to find provider
Try check this authority tags if they are all the same:
(com.yourdomen.yourproject.YourContentProviderClass replace your path to YourContentProviderClass)
res/xml/serchable.xml
Tag searchable
<searchable xmlns:android="//schemas.android.com/apk/res/android"
android:blahblah
......
android:searchSuggestAuthority="com.yourdomen.yourproject.YourContentProviderClass"
AndroidManifest.xml
Tag provider
<provider android:name=".YourContentProviderClass"
android:authorities="com.yourdomen.yourproject.YourContentProviderClass" />
Get display, screen resolution - dimension Android phone development example source code.
Example:
HTC Desire HD
11 (4.3) Diagonal cm (in)
480×800 Resolution
85 (217) ppcm (PPI - Pixels per inch)
480 / 217 = 2.21 inch
800 / 217 = 3.69 inch
Math.sqrt( 2.21*2.21 + 3.69 * 3.69) = 4.3 inch - diagonal
//en.wikipedia.org/wiki/Pixels_per_inch
//en.wikipedia.org/wiki/Dots_per_inch
Typical screen widths:
320dp: a typical phone screen (240x320 ldpi, 320x480 mdpi, 480x800 hdpi, etc).
480dp: a tweener tablet like the Streak (480x800 mdpi).
600dp: a 7” tablet (600x1024 mdpi).
720dp: a 10” tablet (720x1280 mdpi, 800x1280 mdpi, etc).
Emulator skins in the Android SDK
//developer.android.com/guide/practices/screens_support.html
Display display = getWindowManager().getDefaultDisplay();
int nWidth = display.getWidth();
int nHeight = display.getHeight();
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
//get density per inch for example: 120 , 160 , 240
mXDpi = metrics.xdpi; // 160 The exact physical pixels per inch of the screen in the X dimension.
mYDpi = metrics.ydpi;
// density
int nDensity = metrics.densityDpi; // 160 screen density expressed as dots-per-inch
float mMetersToPixelsX = mXDpi / 0.0254f; // 1 inch == 0.0254 metre
float mMetersToPixelsY = mYDpi / 0.0254f;
// Resolution
// The total number of physical pixels on a screen.
int wPix = metrics.widthPixels; // 320 The absolute width of the display in pixels.
int hPix = metrics.heightPixels; // 480 The absolute height of the display in pixels.
int nWidthDisplay = (wPix < hPix)? wPix : hPix;
float nWidthScreenInInch = wPix / mXDpi; //320 / 160 == 2.0 in inch.
float nHeightScreenInInch = hPix / mYDpi; //480 / 160 == 3.0 in inch.
// for example:
// density 120 per inch
//width 320 pix / 120 dpi == width 2.66 inch
//height 480 pix / 120 dpi == height 4.0 inch
// density 240 per inch
//width 320 pix / 240 dpi == width 1.33 inch
//height 480 pix / 240 dpi == height 2.0 inch
Example:
HTC Desire HD
11 (4.3) Diagonal cm (in)
480×800 Resolution
85 (217) ppcm (PPI - Pixels per inch)
480 / 217 = 2.21 inch
800 / 217 = 3.69 inch
Math.sqrt( 2.21*2.21 + 3.69 * 3.69) = 4.3 inch - diagonal
//en.wikipedia.org/wiki/Pixels_per_inch
//en.wikipedia.org/wiki/Dots_per_inch
Typical screen widths:
320dp: a typical phone screen (240x320 ldpi, 320x480 mdpi, 480x800 hdpi, etc).
480dp: a tweener tablet like the Streak (480x800 mdpi).
600dp: a 7” tablet (600x1024 mdpi).
720dp: a 10” tablet (720x1280 mdpi, 800x1280 mdpi, etc).
Emulator skins in the Android SDK
//developer.android.com/guide/practices/screens_support.html
|
|
|
|
|
---|---|---|---|---|
Small screen |
QVGA (240x320) | 480x640 | ||
Normal screen |
WQVGA400 (240x400)
WQVGA432 (240x432) |
HVGA (320x480) | WVGA800 (480x800)
WVGA854 (480x854) 600x1024 |
640x960 |
Large screen |
WVGA800** (480x800)
WVGA854** (480x854) |
WVGA800* (480x800)
WVGA854* (480x854) 600x1024 |
||
Extra Large screen |
1024x600 | WXGA (1280x800)† 1024x768 1280x768 |
1536x1152 1920x1152 1920x1200 |
2048x1536 2560x1536 2560x1600 |
* To emulate this configuration, specify a
custom density of 160 when creating an AVD that uses a WVGA800 or WVGA854 skin. ** To emulate this configuration, specify a custom density of 120 when creating an AVD that uses a WVGA800 or WVGA854 skin. † This skin is available with the Android 3.0 platform |
How setup color coloring highlight highlighting syntax font size and family in Eclipse Java and XML editor Android example
Java editor
xml editor
xml editor double click in Preferences dialog on xml -> Editor -> Syntax coloring
[caption id="attachment_627" align="alignleft" width="297" caption="Eclipse editor syntax color settings"]
[/caption]
Java editor
- Go to Eclipse menu Window -> Preferences
- Doubleclick on Java
- Double click on Editor
- Select Java, Javadocs or Comments and setup color and font
- Font size and family change from Window->Preferences-> General->Appearance->Colors and Fonts
- Press OK for saving changes
xml editor
xml editor double click in Preferences dialog on xml -> Editor -> Syntax coloring
[caption id="attachment_627" align="alignleft" width="297" caption="Eclipse editor syntax color settings"]

Set in AndroidManifest.xml android:theme="@android:style/Theme.NoTitleBar" AndroidManifest.xml example source code.
AndroidManifest.xml
AndroidManifest.xml
<manifest xmlns:android="//schemas.android.com/apk/res/android"
package="com.myexample.without_titlebar">
<application android:label="My app">
<activity android:name="NoTitleBar"
android:theme="@android:style/Theme.NoTitleBar"
android:screenOrientation="portrait"
android:configChanges="keyboardHidden|orientation">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Editace: 2013-12-09 11:04:36
Počet článků v kategorii: 397
Url:save-restore-array-list-android-example
AD