Saving Activity state int String Array Double on Android
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private int[] mData = new int[2]; // fill some values into array!!
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putBoolean("myBoolean", true);
outState.putDouble("myDouble", 2.7);
outState.putInt("myInt", 5);
outState.putString("myString", "Heloo girls!");
int[] data = new int[mData.length];
for (int i = 0; i < data.length; i++) {
data[i] = mData[i];
}
outState.putIntArray("myArray", data);
}
@Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
boolean myBoolean = savedInstanceState.getBoolean("myBoolean", false); // false basic value
double myDouble = savedInstanceState.getDouble("myDouble", 1.5); // 1.5 basic value
int myInt = savedInstanceState.getInt("myInt", 10);
String myString = savedInstanceState.getString("myString", "Hello boys!");
int[] data = savedInstanceState.getIntArray("myArray");
if (data != null && data.length == mData.length) {
for (int i = 0; i < data.length; i++) {
mData[i] = data[i];
}
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
boolean myBoolean = savedInstanceState != null ? savedInstanceState.getBoolean("myBoolean", false) : true;
// etc. .......
}
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Další témata ....(Topics)
In html is horizontal line a tag br. In Android source code you can use a View as xml example bellow.
<View
android:layout_width="fill_parent"
android:layout_height="4dip"
android:background="#ffffff"
android:paddingBottom="10dip"
/>
Problem in Android application:
Solution: check code for set and get selection
E/AndroidRuntime(416): FATAL EXCEPTION: main
E/AndroidRuntime(416): java.lang.IndexOutOfBoundsException
E/AndroidRuntime(416): at java.util.Arrays$ArrayList.get(Arrays.java:75)
E/AndroidRuntime(416): at android.widget.ArrayAdapter.getItem(ArrayAdapter.java:298)
E/AndroidRuntime(416): at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:351)
E/AndroidRuntime(416): at android.widget.ArrayAdapter.getView(ArrayAdapter.java:323)
E/AndroidRuntime(416): at android.widget.Spinner.makeAndAddView(Spinner.java:192)
E/AndroidRuntime(416): at android.widget.Spinner.layout(Spinner.java:151)
E/AndroidRuntime(416): at android.widget.Spinner.onLayout(Spinner.java:115)
Solution: check code for set and get selection
// Spinner _spin1 contain only 49 items
// you can set max 48 ( range 0 - 48)
// 50 is IndexOutOfBoundsException
_spin1.setSelection(50);
Long press by finger on screen
From dialogue select Widgets
Select your widget
Put your widget on the screen
Video tutorial - to add home screen widgets - Android 2.1
From dialogue select Widgets
Select your widget
Put your widget on the screen
Video tutorial - to add home screen widgets - Android 2.1
File->Settings->Plugins and disable some plugins:
Use Emulator AVD with small memmory usage. For example: Virtual tablet with hight resolution have big memmory usage. Virtual phone with 240x320 resolution have small memmory usage.
Use instaed of Emulator, real device connected by USB (smarphone Samsung Galaxy or other recommended by Google whit debugable mode).
If you notice that Android Studio works slowly, consider the possibility to reduce the number of folders under antivirus protection.
Each antivirus check in your project consumes resources. You can significantly improve the performance, if you exclude certain folders from the antivirus protection.
- Google Cloud Testing
- Google Cloud Tools Core
- Google Cloud Tools for Android Studio
- CVS Integration
- Git Integration
- GitHub
- hg4idea
- Subversion Integration
Use Emulator AVD with small memmory usage. For example: Virtual tablet with hight resolution have big memmory usage. Virtual phone with 240x320 resolution have small memmory usage.
Use instaed of Emulator, real device connected by USB (smarphone Samsung Galaxy or other recommended by Google whit debugable mode).
If you notice that Android Studio works slowly, consider the possibility to reduce the number of folders under antivirus protection.
Each antivirus check in your project consumes resources. You can significantly improve the performance, if you exclude certain folders from the antivirus protection.
In your project AndroidManifest.xml you can set permission of Android application example source code.
For example if you want allow your application connection to INTERNET you have to permit this in AndroidManifest.xml.
WebViev show error: Website Not Available you have to permit INTERNET
For example if you want allow your application connection to INTERNET you have to permit this in AndroidManifest.xml.
WebViev show error: Website Not Available you have to permit INTERNET
<uses-permission
android:name="android.permission.INTERNET" />
<uses-permission
android:name="android.permission.GET_ACCOUNTS" />
<uses-permission
android:name="android.permission.USE_CREDENTIALS" />
<uses-permission
android:name="android.permission.MANAGE_ACCOUNTS" />
<uses-permission
android:name="android.permission.AUTHENTICATE_ACCOUNTS" />
<uses-permission
android:name="android.permission.WRITE_SETTINGS" />
<uses-permission
android:name="android.permission.WRITE_SECURE_SETTINGS" />
<uses-permission
android:name="android.permission.READ_CONTACTS" />
<uses-permission
android:name="android.permission.WRITE_CONTACTS" />
<uses-permission
android:name="android.permission.READ_SYNC_STATS" />
<uses-permission
android:name="android.permission.READ_SYNC_SETTINGS" />
<uses-permission
android:name="android.permission.WRITE_SYNC_SETTINGS" />
Editace: 2016-03-02 08:15:58
Počet článků v kategorii: 397
Url:saving-activity-state-int-string-array-double-on-android
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