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POAndroid: Updating TextView/ImageView
 

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  1. POAndroid: Updating TextView/ImageView
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    <p>In my Android application I am displaying an image &amp; text on the main activity, switching to another activity (killing the main activity), and then switching back to the main activity but adding a new image and text pulled from flash.</p> <p>On start-up my activity works as intended, but when I switch from my main activity to another activity, then come back to the main one no image or text is shown. </p> <p>I tried to invalidate() the text and image but seems to still not be showing any image/text.</p> <p><strong>Edit:</strong></p> <p>I can go from Page_Activity to Gallery_Activity, but when I try to go back to Page_Activity from Gallery_Activity I can't change any of the ImageViews/TextViews that are defined in the XML.</p> <p>I provided the relevant code for switching between activities below. </p> <pre><code>private void display_page(int pg_num) { image_overlay = Bitmap.createBitmap(canvas_width, canvas_height, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(image_overlay); int yCo = 0; for(int yCount=0; yCount&lt;num_y_tiles; yCount++){ int xCo = 0; for(int xCount=0; xCount&lt;num_x_tiles; xCount++){ //code to get bufferedimage from flash (works) old_tiles[xCount][yCount] = bufferedimage; canvas.drawBitmap(old_tiles[xCount][yCount], xCo, yCo, null); xCo += TILE_WIDTH; } yCo+= TILE_HEIGHT; } imageview_overlay.setImageBitmap(image_overlay); imageview_overlay.setVisibility(View.VISIBLE); imageview_overlay.invalidate(); textview_page_number.setText("Page " + page_number); textview_page_number.invalidate(); } /* *Inside the click listener to go to Gallery_Activity */ Intent intent = new Intent(v.getContext(), Gallery_Activity.class); boolean is_books_empty = true; String[] stringArray; ArrayList&lt;Integer&gt; images = new ArrayList&lt;Integer&gt;(); int number = R.drawable.gallery_book1; for(int i=0; i&lt;stringArray.length; i++){ images.add(i, R.drawable.gallery_book1); } intent.putExtra("StringArray", ); intent.putIntegerArrayListExtra("BookImages", images); startActivity(intent); finish(); public class Gallery_Activity extends Activity{ public String[] names; public ArrayList&lt;Integer&gt; images; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_gallery); images = getIntent().getIntegerArrayListExtra("BookImages"); names = getIntent().getStringArrayExtra("StringArray"); GridView gridview = (GridView) findViewById(R.id.gridview); gridview.setAdapter (new ImageAdapter(this, names, images)); gridview.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView&lt;?&gt; parent, View v, int position, long id) { Intent intent = new Intent(v.getContext(), Page_Activity.class); String book_names = names[position]; intent.putExtra("BookName", book_names); startActivity(intent); } }); } } </code></pre>
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    1. PTQuestion
    1. USMatt
    1. USMatt
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    1. COShow some code. Btw, you are not killing an Activity just because you open another one (assuming you are not calling finish();)
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      1. POAndroid: Updating TextView/ImageView
      1. USCarnal
    2. COYou can if you have the developer options set (Don't keep activities)
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      1. POAndroid: Updating TextView/ImageView
      1. USSpidy
    3. COPost your code please. Help us to help you.
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      1. POAndroid: Updating TextView/ImageView
      1. USChristos
 

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