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Set Default Start Up Activity Class Java AndroidManifest xml


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Insert into your default start up activity tag inten-filter tag with action MAIN and category LAUNCHER

            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>


AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="//schemas.android.com/apk/res/android"
    package="com.example.blabol"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

397LW NO topic_id




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While cycle loop in Java example | while-cycle-loop-in-java-example


While cycle Java basic example with array of strings.

MainClass.java

public class MainClass {
	public static void main(String[] arg) {
		String[] arrayOfString = { "Hello", "people", "hello", "world!" };
                int i = 0;
		while ( i < arrayOfString.length ){
			System.out.println(arrayOfString[i]);
			i++;
		}
	}
}
101

Start an new Activity Intent with a parameter Android example | start-an-activity-with-a-parameter-android-example


putString(), putBoolean(), putInt() etc.¨
How we can start an activity programmatically.

// MainActivity.java
//  myButton.setOnClickListener
Intent binary = new Intent(getApplicationContext(),Calculate.class);
	Bundle b = new Bundle();
	b.putString("prvni_label", "Decimal");
	b.putString("druhy_label", "Binary");
	b.putString("mode", "binary_to_decimal");
        binary.putExtras(b);
	startActivityForResult(binary, 0);
						
// in Calculate.java onCreate

   TextView mTextView1 = (TextView)findViewById(R.id.textView1);
   TextView mTextView2 = (TextView)findViewById(R.id.textView2);    
     Bundle _bundle = getIntent().getExtras();
		mTextView1.setText(_bundle.getString("prvni_label"));
		mTextView2.setText(_bundle.getString("druhy_label"));




//.................. HOW OPEN START NEW ACTIVITY WITHOUT A PARAMETER .........................

startActivity(new Intent(ThisActivity.this, NewActivity.class));
102

Unable to resolve id for attribute id Graphical layout editor Eclipse error | unable-to-resolve-id-for-attribute-id-graphical-layout-editor-eclipse-error


Problem: erroneous entry of id

<RadioButton android:id="idRadio"
                android:text="My radio button"/>


Solution: @+id/

<RadioButton android:id="@+id/idRadio"
                android:text="My radio button"/>
253

Play Sound Android Example | play-sound-android-example



import android.content.Context;
import android.media.AudioManager;
import android.media.SoundPool;

public class SoundManager
{
  private SoundPool soundPool;
  private int[] sm;
  Context context;

  public SoundManager(Context context) {
    this.context = context;
    soundPool = new SoundPool(4, AudioManager.STREAM_MUSIC, 0);
    sm = new int[2];
    // fill your sounds
    sm[0] = soundPool.load(context, R.raw.my_sound1, 1);
    sm[1] = soundPool.load(context, R.raw.my_sound2, 1);
  }

  public final void playSound(int sound) {
      AudioManager mgr = (AudioManager)context.getSystemService(
          Context.AUDIO_SERVICE);  
      float streamVolumeCurrent =
          mgr.getStreamVolume(AudioManager.STREAM_MUSIC);
      float streamVolumeMax = mgr.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
      float volume = streamVolumeCurrent / streamVolumeMax;
      soundPool.play(sm[sound], volume, volume, 1, 0, 1f);
  }

  public final void cleanUpIfEnd() {
    sm = null;
    context = null;
    soundPool.release();
    soundPool = null;
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}
370

Android Studio failed to convert drawable into a drawable | android-studio-failed-to-convert-drawable-into-a-drawable


Try this:
- check names of drawables (file name must contain only abc...xyz 012...789 _ . in Resources folder ,
names have to start with lower case
MyImage.jpg == problem ,
names with space
my image.jpg == problem,
names with -
my-image.png == problem)
- check duplicate names with other extension ( my_image.jpg - my_image.png makes the problem)
- restart Android Studio
- if problem persist:
- check c:\Users\me\AndroidStudioProjects\myProject\myModule\build\intermediates\res\merged\debug\ drawable folder for corupted names or delete ALL drawable folders
- synk projekt, rebuild projekt
- if problem persist:
- restart Android Studio, wait for complete closure of the Android Studio!


Editace: 2015-04-02 19:27:39
Počet článků v kategorii: 397
Url:set-default-start-up-activity-class-java-androidmanifest-xml

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