Android Tips and Tricks: Difference between revisions

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[[Category:Android]]
[[Category:Android]]
[[Category:201309]]
[[Category:201309]]
= Allow apps read/write on sdcard =
SDFix works for KitKat (4.x) and Lollipop (5.x), you need root privileges
* http://forum.xda-developers.com/shield-tablet/general/fix-ext-sd-write-support-2-0-lollipop-t2946250


= Rotate the Android Virtual Device (AVD) =
= Rotate the Android Virtual Device (AVD) =
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= Debug a service =
= Debug a service =


The the debugger will not be able to connect to a service because there is no Main activity. Processes are started by the Android system at some point. To connect the code to the debugger add some code to your project that is executed at an early stage:
The the Eclipse debugger will not be able to connect to the Android debugger (ADB) for a service because there is no Main activity in the service. Such a  process is started by the Android system (for example an account sync). To connect the code to the debugger add the following to your project and make sure it is traversed at an early stage:


<syntaxhighlight lang=java>
<syntaxhighlight lang=java>
//TODO: wjv: remember to remove this for the final code
//TODO: wjv: remember to remove this for the final code for performance considerations
Toast toastwjv =  Toast.makeText(getApplicationContext(), "waitForDebugger", Toast.LENGTH_LONG);
 
toastwjv.show();
//show a message to remind you it is in here
Toast toast =  Toast.makeText(getApplicationContext(), "waitForDebugger()", Toast.LENGTH_LONG);
toastv.show();
 
//wait for the debugger
android.os.Debug.waitForDebugger();
android.os.Debug.waitForDebugger();
</syntaxhighlight>
</syntaxhighlight>
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= Eclipse hint color, javadoc background =
= Eclipse hint color, javadoc background =


On Ubuntu the Javadoc background could be black, the blue links are difficult to read. Changing this in Eclipse does nor work: (Window>Preferences>General>appearance>Colors and Fonts>Java), we have to change the hint colors for the Ubuntu OS:
On my version of Ubuntu the Javadoc background would be black, the blue links in the dialog are then difficult to read. Unfortunately, changing this in Eclipse did not work: (Window>Preferences>General>appearance>Colors and Fonts>Java) We can however change the hint colors of the Ubuntu OS to an acceptable yellow:


<syntaxhighlight lang=bash>
<syntaxhighlight lang=bash>

Latest revision as of 20:47, 8 August 2016


Allow apps read/write on sdcard

SDFix works for KitKat (4.x) and Lollipop (5.x), you need root privileges

Rotate the Android Virtual Device (AVD)

CTRL+F11/F12

Debug a service

The the Eclipse debugger will not be able to connect to the Android debugger (ADB) for a service because there is no Main activity in the service. Such a process is started by the Android system (for example an account sync). To connect the code to the debugger add the following to your project and make sure it is traversed at an early stage: 

//TODO: wjv: remember to remove this for the final code for performance considerations

//show a message to remind you it is in here
Toast toast =  Toast.makeText(getApplicationContext(), "waitForDebugger()", Toast.LENGTH_LONG);
toastv.show();

//wait for the debugger
android.os.Debug.waitForDebugger();

Android target version

Set target, like 16=4.1.2, 17=4.2.2, 18=4.3 in:

  • modify AndroidManifest.xml
  • modify project.properties
  • Project - clean

Eclipse hint color, javadoc background

On my version of Ubuntu the Javadoc background would be black, the blue links in the dialog are then difficult to read. Unfortunately, changing this in Eclipse did not work: (Window>Preferences>General>appearance>Colors and Fonts>Java) We can however change the hint colors of the Ubuntu OS to an acceptable yellow: 

#backup
sudo cp /usr/share/themes/Ambiance/gtk-3.0/settings.ini /usr/share/themes/Ambiance/gtk-3.0/settings.ini.backup
sudo cp /usr/share/themes/Ambiance/gtk-3.0/gtk.css /usr/share/themes/Ambiance/gtk-3.0/gtk.css.backup
sudo cp /usr/share/themes/Ambiance/gtk-2.0/gtkrc /usr/share/themes/Ambiance/gtk-2.0/gtkrc.backup

#foreground text white => black
sudo sed -i s/tooltip_fg_color:#ffffff/tooltip_fg_color:#000000/g  /usr/share/themes/Ambiance/gtk-3.0/settings.ini /usr/share/themes/Ambiance/gtk-3.0/gtk.css /usr/share/themes/Ambiance/gtk-2.0/gtkrc

#background color black => yellow
sudo sed -i s/tooltip_bg_color:#000000/tooltip_bg_color:#f5f5b5/g  /usr/share/themes/Ambiance/gtk-3.0/settings.ini /usr/share/themes/Ambiance/gtk-3.0/gtk.css /usr/share/themes/Ambiance/gtk-2.0/gtkrc
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  • login
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