Crop cropped cut bitmap image pictures Android example
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Cut, shear, clip, snip, crop a bitmap, picture, image Android example

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();
canvas.drawColor(Color.YELLOW);
// you need to insert a image flower_blue into res/drawable folder
paint.setFilterBitmap(true);
Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(),
R.drawable.flower_blue);
Bitmap croppedBmp = Bitmap.createBitmap(bitmapOrg, 0, 0,
bitmapOrg.getWidth() / 2, bitmapOrg.getHeight());
int h = bitmapOrg.getHeight();
canvas.drawBitmap(bitmapOrg, 10, 10, paint);
canvas.drawBitmap(croppedBmp, 10, 10 + h + 10, paint);
}
}
}

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How add item to ArrayList, sort ArrayList, search find index of item in ArrayList, min(), max() Java basic example.
import java.util.ArrayList;
import java.util.Collections;
public class MainClass {
public static void main(String[] arg) {
String[] arrayOfString = {"nothing", "Hello", "people"
, "bye-bye", "hello", "world!", "End" };
ArrayList<String> arrayList = new ArrayList<String>();
for(String s: arrayOfString)
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// foreach
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System.out.println(str);
Object objMin = Collections.min(arrayList);
System.out.println("Min is: " + objMin);
Object objMax = Collections.max(arrayList);
System.out.println("Max is: " + objMax);
int index = Collections.binarySearch(arrayList, "people");
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}
}
/*
End
Hello
bye-bye
hello
nothing
people
world!
Min is: End
Max is: world!
Index of people is: 5
*/
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TextView mIdTextOk = (TextView)findViewById(R.id.idTextOk);
int _nOk = 57;
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Issue: After after renaming package this problem occurred "R cannot be resolved to a variable".
Solution: Try Clean your project Project » Clean » Clean projects selected below » select your project and click OK.
Try to delete the invalid code and type it again:
Solution: Try Clean your project Project » Clean » Clean projects selected below » select your project and click OK.
Try to delete the invalid code and type it again:
LinearLayout layout = (LinearLayout) findViewById(R.id.layout); // delete R.id.layout
LinearLayout layout = (LinearLayout) findViewById();
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BufferedWriter, FileWriter, write, close MODE_APPEND Java and Android example
Write to file Android example
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try {
String MYFILE = "my_file";
String strText = "My text";
// MODE_APPEND, MODE_WORLD_READABLE, MODE_WORLD_WRITEABLE
// create new file or rewrite existing
FileOutputStream fos = openFileOutput(MYFILE, getApplicationContext().MODE_PRIVATE);
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fos.close();
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e.toString();
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// new file
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Rotate a bitmap Android source code.

public class MainActivity 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();
canvas.drawColor(Color.YELLOW);
// Bitmap b = Bitmap.createBitmap(200, 200, Bitmap.Config.ARGB_8888);
// you need to insert a image flower_blue into res/drawable folder
Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.flower_blue);
Matrix mat = new Matrix();
mat.postRotate(90);
Bitmap bmpRotate = Bitmap.createBitmap(bmp, 0, 0,
bmp.getWidth(), bmp.getHeight(),
mat, true);
int h = bmp.getHeight();
canvas.drawBitmap(bmp, 10,10, paint);
canvas.drawBitmap(bmpRotate, 10,10 + h + 10, paint);
}
}
}

Editace: 2011-11-14 10:57:34
Počet článků v kategorii: 396
Url:crop-cropped-cut-bitmap-image-pictures-android-example
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