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How evaluate any expression in Eclipse debugger editor Android example


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Tutorial by pictures how evaluate a variable in Eclipse debugger window.

1.) Open Debug perspective in Eclipse and to start debugging a Activity.
eclipse-debug-perspective


2.) Open Display window from menu Window->Show view->Display

eclipse dislplay window

3.) Set breakpoint where you need to evaluate a variable.

eclipse-toggle-breakpoint

4.) Debug the Activity to breakpoint.

eclipse-debugger-breakpoint


5.) Into the Display window type code for evaluate your variable and execute code.

eclipse-type-evaluate-code-to-display-window


6.) Check if change of value a variable

eclipse-evaluate-a-variable


397LW NO topic_id




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Not request focus EditText if startup Android - hide keyboard if startup.

Remove: from EditText

Create a LinearLayout and set the:
attributes android:focusable="true" android:focusableInTouchMode="true"


   <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:focusable="true" 
        android:focusableInTouchMode="true"
        android:orientation="vertical" >
</LinearLayout>
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Number convert int to string Java Android example code | number


Convert number int to string Android Java example source code.

int n = 0;

try {
    n = Integer.parseInt("21"));
} catch(NumberFormatException e) {
   System.out.println("Could not parse " + e);
} 
// int to string
String s = String.valueOf(24);
58

HorizontalScrollView ScrollView horizontal vertical Android xml example | horizontalscrollview-scrollview-horizontal-vertical-android-xml-example


HorizontalScrollView ScrollView LinearLayout horizontal vertical Android xml basic example and image.

[caption id="attachment_889" align="alignleft" width="200" caption="horizontal scrollview horizontalscrollview android"]horizontalscrollview-android[/caption]


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="@+id/LinearLayout01"
	android:layout_width="fill_parent" android:layout_height="fill_parent"
	xmlns:android="//schemas.android.com/apk/res/android">

	// horizontal and vertical Scrollview
	<ScrollView android:id="@+id/ScrollView01"
		android:layout_height="135px" android:layout_width="wrap_content"
		android:scrollbars="horizontal|vertical">

		// HorizontalScrollview
		<HorizontalScrollView android:id="@+id/HorizontalScrollView01"
			android:layout_height="fill_parent" android:layout_width="wrap_content">

			<LinearLayout android:id="@+id/LinearLayout02"
				android:layout_width="wrap_content" android:orientation="vertical"
				android:layout_height="fill_parent">
				<LinearLayout android:orientation="horizontal"
					android:layout_width="fill_parent" android:layout_height="fill_parent"
					android:layout_weight="1">
					<TextView android:text="red" android:gravity="center_horizontal"
						android:background="#aa0000" android:layout_width="200px"
						android:layout_height="fill_parent" android:layout_weight="1" />
					<TextView android:text="green" android:gravity="center_horizontal"
						android:background="#00aa00" android:layout_width="200px"
						android:layout_height="fill_parent" android:layout_weight="1" />
					<TextView android:text="blue" android:gravity="center_horizontal"
						android:background="#0000aa" android:layout_width="200px"
						android:layout_height="fill_parent" android:layout_weight="1" />
					<TextView android:text="yellow" android:gravity="center_horizontal"
						android:background="#aaaa00" android:layout_width="200px"
						android:layout_height="fill_parent" android:layout_weight="1" />
				</LinearLayout>

				<LinearLayout android:orientation="vertical"
					android:layout_width="fill_parent" android:layout_height="fill_parent"
					android:layout_weight="1">
					<TextView android:text="row one" android:textSize="15pt"
						android:layout_width="fill_parent" android:layout_height="wrap_content"
						android:layout_weight="1" />
					<TextView android:text="row two" android:textSize="15pt"
						android:layout_width="fill_parent" android:layout_height="wrap_content"
						android:layout_weight="1" />
					<TextView android:text="row three" android:textSize="15pt"
						android:layout_width="fill_parent" android:layout_height="wrap_content"
						android:layout_weight="1" />
					<TextView android:text="row four" android:textSize="15pt"
						android:layout_width="fill_parent" android:layout_height="wrap_content"
						android:layout_weight="1" />
				</LinearLayout>


			</LinearLayout>
		</HorizontalScrollView>
	</ScrollView>
</LinearLayout>



Other sample


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="//schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:id="@+id/layout"
    android:orientation="vertical" >

    <HorizontalScrollView
        android:id="@+id/horizontalScrollView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >

        <LinearLayout
            android:id="@+id/linearLayout1"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:orientation="horizontal" >
        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="Hello world! First TextView" />

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Large Text"
            android:textAppearance="?android:attr/textAppearanceLarge" />

        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Medium Text"
            android:textAppearance="?android:attr/textAppearanceMedium" />

        </LinearLayout>



    </HorizontalScrollView>

</LinearLayout>

20

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);



138

Draw text drawText Android basic example | draw-text-drawtext-android-basic-example


drawText(), setColor(), setTextSize(), setTextAlign()

public class ApokusActivity extends Activity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(new SampleView(this));
	}

	private static class SampleView extends View {

		// CONSTRUCTOR
		public SampleView(Context context) {
			super(context);
			setFocusable(true);

		}
		@Override
		protected void onDraw(Canvas canvas) {
			Paint paint = new Paint();
			
            paint.setColor(Color.YELLOW);
            paint.setTextSize(60);
            //paint.setTextAlign(Paint.Align.CENTER);

            canvas.drawText("Hello world!", 0, 50, paint);
		}

	}
}



Editace: 2014-02-15 20:46:19
Počet článků v kategorii: 397
Url:how-evaluate-any-expression-in-eclipse-debugger-editor-android-example

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