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android.app.Application cannot be cast to android.app.Activity


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If you using Context as parameter of function try this solution:

public class MyActivity extends Activity {
// bla bla bla .......
//error 
myFc( getapplicationcontext());
// OK
myFc(MyActivity.this);

397LW NO topic_id




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Další témata ....(Topics)


327

Links too close together Mobile friendly page | links-too-close-together-mobile-friendly-page


Try set bigger line-height of links and font size for example:


/*in css*/
.links{
line-height: 48px;
font-size: 20px;
background-color: rgb(255,204,0);
}

/* in html page set class of link*/
<a class="links" href="m.mydomen.com/mypage.html">Blah blah mypage</a>

// or in css for all links on page
a {
line-height: 48px;
font-size: 20px;
}

/*html page*/
<a href="m.mydomen.com/mypage.html">Blah blah mypage</a>

330

Android Studio reduce memory usage of PC | android-studio-reduce-memory-usage


File->Settings->Plugins and disable some plugins:

  • Google Cloud Testing

  • Google Cloud Tools Core

  • Google Cloud Tools for Android Studio

  • CVS Integration

  • Git Integration

  • GitHub

  • hg4idea

  • Subversion Integration


Use Emulator AVD with small memmory usage. For example: Virtual tablet with hight resolution have big memmory usage. Virtual phone with 240x320 resolution have small memmory usage.

Use instaed of Emulator, real device connected by USB (smarphone Samsung Galaxy or other recommended by Google whit debugable mode).

If you notice that Android Studio works slowly, consider the possibility to reduce the number of folders under antivirus protection.
Each antivirus check in your project consumes resources. You can significantly improve the performance, if you exclude certain folders from the antivirus protection.
387

Error type 3 Activity class does not exist | error-type-3-activity-class-does-not-exist


Try some solution - each individually or all

  1. Check AndroidManifest.xml activity declaration
    <activity
                android:name=".EnableProfileActivity"
                android:label="@string/app_name" />


  2. Delete BUILD folder in module tree and Clean / Rebuild project

  3. Restart Android Studio

38

TableRow TableLayout table row add delete remove removeview addview Android example | tablerow-tablelayout-table-row-add-delete-remove-removeview-addview-android-example


TableRow TableLayout table row add delete remove removeview addview get table row index indexOfChild create table row dynamically TextView dynamically Android example
Main.java

TableLayout table = (TableLayout)findViewById(R.id.table);
TableRow row = (TableRow)findViewById(R.id.row);

// get table row index android.
int nIndex = table.indexOfChild(row);
table.removeView(row); // invisible and height == 0
// add row into same place 
table.addView(row, nIndex); // visible

// add row into certain position
table.addView(row, 3); // visible

// create new TableRow dynamically 
TableRow tr = new TableRow(this);
         tr.setLayoutParams(new LayoutParams(
                        LayoutParams.FILL_PARENT,
                        LayoutParams.WRAP_CONTENT));

// create own function for append TableRow
   private void appendRow(TableLayout table) {
        TableRow row = new TableRow(this);

        TextView hLabel = new TextView(this);
        hLabel.setText("Some text");
        hLabel.setPadding(3, 3, 3, 3);

        TextView hNextLabel = new TextView(this);
        hNextLabel.setText("Next text");
        hNextLabel.setPadding(3, 3, 3, 3);
        hNextLabel.setGravity(Gravity.RIGHT | Gravity.TOP);

        row.addView(hLabel, new TableRow.LayoutParams(1));
        row.addView(hNextLabel, new TableRow.LayoutParams());

        table.addView(row, new TableLayout.LayoutParams());
    }



main.xml ScrollView, TableLayout, TableRow, TextView Android xml layout example

<ScrollView xmlns:android="//schemas.android.com/apk/res/android"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent">
    <TableLayout
                android:id="@+id/table"
                  android:layout_width="fill_parent"
                 android:layout_height="fill_parent">
        <TableRow>
            <TextView android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:text="Row index 0"/>
        </TableRow>
        <TableRow android:id="@+id/row">
            <TextView android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:text="Row index 1"/>
        </TableRow>
        <TableRow>
            <TextView android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:text="Row index 2"/>
        </TableRow>
        <TableRow>
            <TextView android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:text="Row index 3"/>
        </TableRow>
		</TableLayout>
</ScrollView>

74

Continue statement Java example | continue-statement-java-example


For and continue statement in Java.

public class MainClass {
	public static void main(String[] arg) {
		String[] arrayOfString = { "Hello", "people", "hello", "world!" };

		for (int i = 0; i < arrayOfString.length; i++){
			if(arrayOfString[i].equals("hello"))
				continue; // skip to for
			System.out.println(arrayOfString[i]);
		}
	}
}
/*
Hello
people
world!
*/


Editace: 2015-11-28 18:55:09
Počet článků v kategorii: 397
Url:android-app-application-cannot-be-cast-to-android-app-activity

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