Draw Arc Android basic example
drawArc(), Canvas, Paint, setStyle()
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) {
canvas.drawColor(Color.CYAN);
Paint p = new Paint();
// smooths
p.setAntiAlias(true);
p.setColor(Color.RED);
p.setStyle(Paint.Style.STROKE);
p.setStrokeWidth(5);
// opacity
//p.setAlpha(0x80); //
RectF rectF = new RectF(50, 20, 100, 80);
canvas.drawOval(rectF, p);
p.setColor(Color.BLACK);
canvas.drawArc (rectF, 90, 45, true, p);
}
}
}
396LW NO topic_id
AD
Další témata ....(Topics)
No resource found that matches the given name - error examples.
Exist resource file?
Is code written correctly?
Exist resource file?
Is code written correctly?
// No resource found that matches the given name (at id with value @id/myButton).
android:id="@id/myButton" // invalid id notation
android:id="@+id/myButton" // correct
// No resource found that matches the given name
// (at icon with value @drawable/icons).
// exist file icons in res/drawable folder?
<application android:icon="@drawable/icons"
//No resource found that matches the given name
//(at theme with value @style/MyThem).
<activity android:name=".Main"
android:label="@string/app_name"
android:theme="@style/MyThem">
// Exist style MyThem in styles.xml ? No only MyTheme
<style name="MyTheme" parent="android:Theme">
<item name="android:windowTitleSize">50px</item>
</style>
// exist file my_background in folder drawable ?
android:background="@drawable/my_background" //
// no resource found that matches the given name(at "label" with value "@string/app_name")
// have you the string resource defined in res/values/strings.xml ?
<string name="app_name">"My App"</string>
// Context instead Activity as a parameter
@Override
public void onAttach(Context context) {
super.onAttach(context);
Activity a;
if (context instanceof Activity){
a=(Activity) context;
}
}
OnNoteClickedListener listener;
/* old emxample of usage
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
listener = (OnNoteClickedListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnNoteClickedListener");
}
}
*/
// new version of code
@Override
public void onAttach(Context context) {
super.onAttach(context);
Activity a;
if (context instanceof Activity){
a=(Activity) context;
try {
listener = (OnNoteClickedListener) a;
} catch (ClassCastException e) {
throw new ClassCastException(a.toString()
+ " must implement OnNoteClickedListener");
}
}
}
build.gradle in module have higher priority then AndrodiManifest.xml
Try this.
AndroidManifest.xml have code:
build.gradle have code:
Warning in AndroidManifest.xml:
Try this.
AndroidManifest.xml have code:
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="23" />
build.gradle have code:
defaultConfig {
applicationId "cz.okhelp.words"
minSdkVersion 9
targetSdkVersion 19
versionCode 107
versionName "1.0.7"
}
Warning in AndroidManifest.xml:
This targetSdkVersion value (23) is not used; it is always overridden by the value specified in the Gradle build script (19) less... (Ctrl+F1)
The value of (for example) minSdkVersion is only used if it is not specified in the build.gradle build scripts. When specified in the Gradle build scripts, the manifest value is ignored and can be misleading, so should be removed to avoid ambiguity.
Errors:
E/Ads(333): The android:configChanges value of the com.google.ads.AdActivity must include screenLayout.
E/Ads(333): The android:configChanges value of the com.google.ads.AdActivity must include uiMode.
E/Ads(333): The android:configChanges value of the com.google.ads.AdActivity must include screenSize.
E/Ads(333): The android:configChanges value of the com.google.ads.AdActivity must include smallestScreenSize.
E/Ads(333): You must have AdActivity declared in AndroidManifest.xml with configChanges.
Solution:
Try to using a lower version of the GoogleAdMobAdsSDK ADS SDK in project:
GoogleAdMobAdsSDK-4.0.4
How add SDK to project
Add activity to AndroidManifest.xml
E/Ads(333): The android:configChanges value of the com.google.ads.AdActivity must include screenLayout.
E/Ads(333): The android:configChanges value of the com.google.ads.AdActivity must include uiMode.
E/Ads(333): The android:configChanges value of the com.google.ads.AdActivity must include screenSize.
E/Ads(333): The android:configChanges value of the com.google.ads.AdActivity must include smallestScreenSize.
E/Ads(333): You must have AdActivity declared in AndroidManifest.xml with configChanges.
Solution:
Try to using a lower version of the GoogleAdMobAdsSDK ADS SDK in project:
GoogleAdMobAdsSDK-4.0.4
How add SDK to project
Add activity to AndroidManifest.xml
// .............. blah
<uses-sdk android:minSdkVersion="4"/>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application android:icon="@drawable/dicts_ico" android:label="@string/app_name"
>
<meta-data
android:value="a12345_your_number"
android:name="ADMOB_PUBLISHER_ID" />
<activity android:name=".MainStartMenu"
android:label="@string/app_name"
android:configChanges="keyboardHidden|orientation"
>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<!-- Google ads -->
<activity android:name="com.google.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation"/>
// ......... blah
break statement in Java Android basic example
MainClass.java
MainClass.java
public class MainClass {
public static void main(String[] arg) {
String[] arrayOfString = {"nothing", "Hello", "people"
, "bye-bye", "hello", "world!", "end" };
for (int i = 0; i < arrayOfString.length; i++) {
System.out.println(arrayOfString[i]);
if(i > 2)
break; // end of loop
}
}
}
/*
nothing
Hello
people
bye-bye
*/
Editace: 2013-12-09 13:11:05
Počet článků v kategorii: 396
Url:draw-arc-android-basic-example