I'm new to Android and I have tried to create a new View. But I get this error on run
Could not identify launch Activity: Default Activity not found
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<com.bamlineapps.dungeonexplorer.DungeonExplorer xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/dungeonView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
</com.bamlineapps.dungeonexplorer.DungeonExplorer>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
Here is my android manifest as I think that the error comes from here:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.bamlineapps.dungeonexplorer">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme"
tools:ignore="GoogleAppIndexingWarning">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Your manifest file must list all activities you want to use and the one you want to be your entry point needs to have right intent filter:
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
I'm guessing that you've forgot to
@Override
public void onDraw(Canvas canvas) {
super.onDraw(canvas); // <- this line
// Your code here
}
And I can only guess because there's some important data missing in the question - Could you please attach the crash Logs/errors printed on console on the question?
Try null checking your variables and initializing stuff in the constructor of your class like so:
public class YourView extends ImageView { // I don't know; provide more info
private Bitmap chibiSprite;
public YourView(Context context) {
super(context);
chibiSprite = BitmapFactory.decodeResource(getResources(), R.drawable.chibi_sprite);
}
@Override
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
if(canvas != null)
drawCharacter(canvas);
}
public void drawCharacter(Canvas canvas) {
// Customize these three
float location_x = 100F;
float location_y = 100F;
Paint custom_paint = null;
canvas.drawBitmap(chibiSprite, location_x, location_y, custom_paint);
}
}
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.