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Get Screen Size Pixels per Inch Android example



The exact physical pixels per inch of the screen
Get size of pixel
Get DPI
Get count of pixels per inch

        float mXDpi;
        float mYDpi;
           DisplayMetrics metrics = new DisplayMetrics();
            getWindowManager().getDefaultDisplay().getMetrics(metrics);
            mXDpi = metrics.xdpi; // The exact physical pixels per inch of the screen in the X dimension. 
            mYDpi = metrics.ydpi;
          float  mMetersToPixelsX = mXDpi / 0.0254f; // 1 inch == 0.0254 metre
          float  mMetersToPixelsY = mYDpi / 0.0254f;



397LW NO topic_id



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How set gray text to EditText Android example | how-set-gray-text-to-edittext-android-example


Example source code for Android development. How set gray text to EditText when EditText is blank.
Hint text to display when the text is empty.
In layout/main.xml insert to EditText row Attribute Name android:hint="Some text"


<EditText
        android:id="@+id/myEdit" 
	android:layout_height="wrap_content" android:layout_width="fill_parent"
        android:hint="Some text"
	android:singleLine="true"
</EditText>	



Programatically you can use method setHint:


// setHint(CharSequence hint) example
(EditText)findViewById(R.id.myEdit).setHint("My text");
// or int resId as method setHint(int resId) 
EditText myEdit = findViewById(R.id.myEdit);
myEdit.setHint(R.string.app_name);



271

Eclipse - How open deleted project from workspace | eclipse-how-open-deleted-project-from-workspace


If project is in workspace and only not visible in project explorer using this:



Click on some project in project explorer
Menu:
File
Import project
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Android Google Maps Night Mode | android-google-maps-night-mode


If you want save battery, select "Satelite map" from map menu and reduce the brightness of the display.

android-google-maps-night-mode-as-satelite-map.jpg
391

Expected resource of type raw drawable | expected-resource-of-type-raw-drawable


Try insert + before R.drawable.xxxx

// error
InputStream is = context.getResources().openRawResource(R.drawable.app_sample_code);

// ok
InputStream is = context.getResources().openRawResource(+R.drawable.app_sample_code);

246

Include xml into another xml Android Example | include-xml-into-another-xml-android-example


How include layout defined in other xml file into another xml file example:
res/layout/my_layout.xml into
main.xml

<include  layout="@layout/my_layout" android:id="@+id/idMyLayout" />


Editace Jana Žákovská : 2013-12-09 13:06:15
Počet článků v kategorii: 397
Url:get-screen-pixels-android-example
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