Write new file or append text Java Android example
AD MOB
BufferedWriter, FileWriter, write, close MODE_APPEND Java and Android example
Write to file Android example
Write to file Java example
Write to file Android example
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);
// append to file
FileOutputStream fos = openFileOutput(MYFILE, getApplicationContext().MODE_APPEND);
fos.write(strText.getBytes());
fos.close();
} catch (IOException e) {
e.toString();
}
Write to file Java example
try {
// new file
BufferedWriter out = new BufferedWriter(
new FileWriter("outfilename"));
// append text
BufferedWriter out = new BufferedWriter(new FileWriter("outfilename", true));
out.write("some text");
out.close();
} catch (IOException e) {
e.toString();
}
397LW NO topic_id
AD
Další témata ....(Topics)
Change the title associated with this activity. If this is a top-level activity, the title for its window will change. If it is an embedded activity, the parent can do whatever it wants with it.
String sTitle = "My new title";
setTitle(sTitle);
public boolean isConnected() {
try {
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
return cm.getActiveNetworkInfo().isConnectedOrConnecting();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.e("isConnected", e.getMessage());
Toast.makeText(getApplicationContext(), e.getMessage(),
Toast.LENGTH_LONG).show();
return false;
}
Set in AndroidManifest.xml android:theme="@android:style/Theme.NoTitleBar" AndroidManifest.xml example source code.
AndroidManifest.xml
AndroidManifest.xml
<manifest xmlns:android="//schemas.android.com/apk/res/android"
package="com.myexample.without_titlebar">
<application android:label="My app">
<activity android:name="NoTitleBar"
android:theme="@android:style/Theme.NoTitleBar"
android:screenOrientation="portrait"
android:configChanges="keyboardHidden|orientation">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
/data/data/<package>/shared_prefs/<package>_preferences.xml
String TAG = "MyActivityName";
File f = new File("/data/data/"+this.getPackageName()
+"/shared_prefs/"+this.getPackageName()+"_preferences.xml");
if(f.exists())
Log.d(TAG, "exist");
else
Log.d(TAG, "not exist");
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.GREEN);
Bitmap b = Bitmap.createBitmap(200, 200, Bitmap.Config.ALPHA_8);
paint.setColor(Color.BLUE);
Canvas c = new Canvas(b);
c.drawRect(0, 0, 200, 200, paint);
canvas.drawBitmap(b, 10,10, paint);
}
}
}
Editace: 2011-10-03 11:09:06
Počet článků v kategorii: 397
Url:write-file-java-android-example
AD
