Create Button and TextView dynamically - Android sample
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public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LinearLayout layout = (LinearLayout) findViewById(R.id.layout);
TextView textView = new TextView(this);
textView.setText("Text View ");
LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT
);
layout.addView(textView, p);
Button buttonView = new Button(this);
buttonView.setText("Button");
buttonView.setOnClickListener(mThisButtonListener);
layout.addView(buttonView, p);
}
private OnClickListener mThisButtonListener = new OnClickListener() {
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Hello !",
Toast.LENGTH_LONG).show();
}
};
}
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| Brand | Samsung |
| Model (codename) | Galaxy Mini (S5570) |
| Price (cena, včetně DPH) | 3500 / 06.2012 |
| Display size in Inch (v palcích) | 3.14 |
| Display-resolution | 240x320 |
| Dotek-typ | kapacitní |
| CPU typ | MSM7227 |
| CPU MHz | 600 |
| CPU core | |
| L2 cache | yes |
| RAM | 256 |
| ROM | 512 |
| GPU | Adreno 200 |
| NenaMark2 Benchmark | |
| GPU-GLBenchmark | |
| Baterie mAh | 1200 |
| Foto MPx | 3 |
| Autofocus | no |
| Video | QVGA (320 x 240) při 15 frames/s |
| Official Android ICS | Android Froyo 2.2 |
| CyanogenMod support | yes |
| Dotek-prstů-max | Dual-touch (two fingers) |
| Display-ppi | 127 |
| Display-retina | 39% |
| Networks | GSM&EDGE (850 / 900 / 1.800 / 1.900 MHz) 3G (900 / 2.100 MHz) |
| Connectivity | Bluetooth V2.1 , USB V2.0 , USB mass storage , SyncML(DM) , WIFI , AGPS, 3.5 mm jack |
| Note |
Samsung S5570 Galaxy Mini - image
If some memory leak - problem try release of memory used of a big Bitmap what already not to need;
//developer.android.com/reference/android/graphics/Bitmap.html
Free the native object associated with this bitmap, and clear the reference to the pixel data. This will not free the pixel data synchronously; it simply allows it to be garbage collected if there are no other references. The bitmap is marked as "dead”, meaning it will throw an exception if getPixels() or setPixels() is called, and will draw nothing. This operation cannot be reversed, so it should only be called if you are sure there are no further uses for the bitmap. This is an advanced call, and normally need not be called, since the normal GC process will free up this memory when there are no more references to this bitmap.
Bitmpap bmp; // not null
bmp.recycle();
bmp = null;
final boolean bmpIsRecycled = bmp.isRecycled()
// Returns true if this bitmap has been recycled.
//developer.android.com/reference/android/graphics/Bitmap.html
Free the native object associated with this bitmap, and clear the reference to the pixel data. This will not free the pixel data synchronously; it simply allows it to be garbage collected if there are no other references. The bitmap is marked as "dead”, meaning it will throw an exception if getPixels() or setPixels() is called, and will draw nothing. This operation cannot be reversed, so it should only be called if you are sure there are no further uses for the bitmap. This is an advanced call, and normally need not be called, since the normal GC process will free up this memory when there are no more references to this bitmap.
// image from res/drawable
int resID = getResources().getIdentifier("my_image",
"drawable", getPackageName());
// view
int resID = getResources().getIdentifier("my_resource",
"id", getPackageName());
// string
int resID = getResources().getIdentifier("my_string",
"string", getPackageName());
int nf = Math.round(5.789f);
System.out.print(nf); // 6
float f = 28.611f;
int n3 = Math.round(f);
System.out.println(n3); // 29
double d = 1234.56;
long lon = Math.round(d);
System.out.println(lon); // 1235
int diff = 90 - 40;
// float fDeleni = diff / 10; // error code
float fDeleni = (float)diff / 10.f; // ok
int nRound = Math.round(fDeleni);
// Caution:
int n2 = (int) 8.999f;
System.out.println(n2); // 8
Editace: 2011-10-22 07:54:35
Počet článků v kategorii: 397
Url:create-button-dynamically-android-sample
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