Error while trying to display a vector (SVG) imageView!

Question

Good guys, in this app I intend to do a test inserting a vector image in the main Activity.

I did the integration process all right, as you can see:

But even having followed the entire tutorial, the following error appears, so that you can not even run the app:

Mainactivity:

package genesysgeneration.ruleoftree;

import android.content.Intent;
import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;

import com.larvalabs.svgandroid.SVG;
import com.larvalabs.svgandroid.SVGParser;

public class Main01Activity extends AppCompatActivity implements View.OnClickListener{

    private EditText et01, et02, et03;
    private TextView tv01, tvTest;
    private double l01, l02, l03, equalizer, lxx;
    private Button btnChange01, btnCompras, btnMoeda;
    private ImageView logo;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main01);

        logo.setBackgroundColor(Color.WHITE);
        SVG svg = SVGParser.getSVGFromAsset(getResources(), R.raw.tree);
        logo.setImageDrawable(svg.createPictureDrawable());
        setContentView(logo);

        tvTest=(TextView)findViewById(R.id.tvTest);
        tv01=(TextView)findViewById(R.id.tv01);
        tvTest.setText(String.valueOf(0));
        tv01.setText(String.valueOf(0));

    }
  
}

OBS - I didn’t transcribe all the code as they must have perceived, because there is no need, since the rest is function smooth.

Tutorial in question (video) => Integrate SVG => (website) Android Coffe

Answer 1

Probably this error is because Voce is trying to grab the file as an Assets item "SVG svg = Svgparser.getSVGFromAsset(getResources(), R.raw.Tree);",but probably the Assets folder has not been defined, to create it, right-click project and choose new/Folder/Assets Folder.

try it this way:

//...
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main01);

    logo.setBackgroundColor(Color.WHITE);
    // SVG svg = SVGParser.getSVGFromAsset(getResources(), R.raw.tree);
    // melhor voce criar uma pasta assets, copiar o arquivo para ela e usar 
    final SVG svg = SVGParser.getSVGFromAsset(getAssets(), "tree.svg");
    logo.setImageDrawable(svg.createPictureDrawable());
    //setContentView(logo);
    // desnecessario essa linha
}
//...

and it is never recommended to have the name of an Activity with number or upper case letters, so, if possible, rename it to another name that contains only letters.

Answer 2

In the latest versions of Android Studio it is possible to use SVG files without resorting to external libraries.

Right-click on the folder drawable and in the menu that opens, choose new->Vector Asset.

In the choose window Local file (SVG, PSD), indicate the path to the file, click next and then Finish in the next window.

^{Source: android documentation}

This procedure creates an xml file(Vectordrawable) that can be used like any other icon.

---

Note 1:

To use Vectordrawable in lower versions than Android 5.0 (API level 21) you need Support Library 23.2.0 and configure the build.Gradle as follows:

//For Gradle Plugin 2.0+
 android {
   defaultConfig {
     vectorDrawables.useSupportLibrary = true
    }
 }

and instead of android:src should use android:srcCompat. See the documentation for more complete information.

As pointed out by @rsicarelli, from the version 23.4.0 of the Support Library it is necessary to explicitly do the enable of functionality by putting

static {
    AppCompatDelegate.setCompatVectorFromSourcesEnabled(true);
}

at the top of Activity.

Note 2:

In the latest versions of Support Library(25.1.1 on this date), as long as you don’t worry about APK having a few more Kbs, you don’t need to apply the one described in note 1.
Android Studio generates a PNG for each Vectordrawable to be used in versions below 21.

Note 3

Retro-compatibility is not always guaranteed.

This post explains in diagram form what is described in the notes.