Change background color dynamically View TableRow setBackgroundColor Android example

How change background color of View Android sample.

MainActivity.java


public class MainActivity extends Activity {
TextView hTextView;
TableRow hTableRow;
Button hButton, hButtonStop;
private Handler mHandler = new Handler();
private int nCounter = 0;
@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        hTextView = (TextView)findViewById(R.id.idTextView);
        hButton = (Button)findViewById(R.id.idButton);
        hButton.setOnClickListener(mButtonStartListener);
        hTableRow = (TableRow)findViewById(R.id.idTableRow1);


        
        
    } // end onCreate

 View.OnClickListener mButtonStartListener = new OnClickListener() {
	public void onClick(View v) {
           hTableRow.setBackgroundColor(Color.YELLOW);
	}
 };
}

main.xml


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


<TableLayout android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/tableLayout1">
    <TableRow android:id="@+id/idTableRow1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" android:background="#5655AA">
<TextView  
	android:id="@+id/idTextView"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
    
    </TableRow>
</TableLayout>
</LinearLayout>

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279

Android Error: Converting to string: TypedValue{t=0x10/d=0xe a=-1} | android-error-converting-to-string-typedvaluet0x10d0xe-a-1

Converting to string: TypedValue{t=0x10/d=0xe a=-1}


    

        14 // error

        "18" // ok

172

Custom View Android Basic Example | custom-view-android-basic-example

Activity.java


public class A extends Activity{
	Bitmap bm;
	 TouchImageView touch;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		 setContentView(R.layout.main);
		 
		 bm = BitmapFactory.decodeResource(getResources(), R.drawable.chinese_sky_map);
 		 touch =  (TouchImageView)findViewById(R.id.myImageView);
	  touch.setImageBitmap(bm);
		 
	}
}

\res\layout\main.xml


<?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:orientation="vertical" >


    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello" />

    <cz.okhelp.TouchImageView.TouchImageView
        android:id="@+id/myImageView"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        
        />

</LinearLayout>

location TouchImageView\src\cz\okhelp\TouchImageView\TouchImageView.java


public class TouchImageView extends ImageView {


    Context context;

// constructor wihtout using  *.xml file
//    public TouchImageView(Context context) {
//        super(context);
// }

// constructor with xml file
    public TouchImageView(Context context, AttributeSet attrs)
    {
      super(context, attrs);
      super.setClickable(true);
        this.context = context;
  }
}

335

Android emulator freezes at startup create new virtual device | android-emulator-freezes-at-startup-create-new-virtual-device

If Android emulator freezes at startup, try create new virtual device with smaller memory and cpu usage, or select older version of Android, or buy new pc with higher performance.

open AVD MANAGER

press Create Virtual Device

select Device with small memory usage (e.g. 480x800 of resolution) - Next

check - Show downloadable ....

Download - lower version of system Android, select, press - Next

check data, Show Advanced Settings, check Use host... and press Finish

android/android-studio-create-virtual-device-emulator.png

How to install mount SD card for Eclipse Android Emulator | how-install-sd-card-on-android-eclipse-emulator

If you want download some *.apk file from internet and try on your emulator you get error than you have to install SD card. You have to closing Android emulator.
Mount Android emulator SD card instruction

In Eclipse go in menu Window - Android SDK and Avg Manager

Select Virtual devices

Select AVD Name where you need install SD card

Click on Edit button

In open dialog go to SD card - Size: and write 500

Press button Edit AVD

Run AVD emulator

Image how install SD card on Android emulator in Eclipse.