Android: Using Findviewbyid() with a String/In a Loop

Android: Using findViewById() with a string / in a loop

You should use getIdentifier()

for(int i=0; i<some_value; i++) {
   for(int j=0; j<some_other_value; j++) {
    String buttonID = "btn" + i + "-" + j;
    int resID = getResources().getIdentifier(buttonID, "id", getPackageName());
    buttons[i][j] = ((Button) findViewById(resID));
    buttons[i][j].setOnClickListener(this);
   }
}

Findviewbyid() in for loop

1.init TextView、ImageView array

2.add for loop

3.get id of the view

4.findViewById in the code

Try this .

TextView[]  textViews1 = new TextView[7];
TextView[]  textViews2 = new TextView[7];
ImageView[]  imageViews = new ImageView[7];

for (int j = 0; j < 7; j++) {
    String viewmt = "mt" + (i + 1);
    String viewtid = "tid" + (i + 1);
    String viewImage = "imageView" + (i + 1);
    int resIDmt = getResources().getIdentifier(viewmt, "id", getPackageName());
    int resIDtid = getResources().getIdentifier(viewtid, "id", getPackageName());
    int resIDImage = getResources().getIdentifier(viewImage, "id", getPackageName());

    textViews1[j] = ((TextView) v.findViewById(resIDmt));
    textViews2[j] = ((TextView) v.findViewById(resIDtid));
    imageViews[j] = ((ImageView) v.findViewById(resIDImage));
}

FindViewById where ID is dynamic string

You can get an identifier from a string by using:

notes = (TextView)findViewById(getResources().getIdentifier(VIEW_NAME, "id", getPackageName()));

Where VIEW_NAME is whatever identifier string you're generating. After that, you can set the text of it like you currently are. This also works if you need to get strings and drawables as well, just change id to the appropriate type.

findViewById with for loop

Do It like this. You can get drawable names from array stored in xml or code.

for (int i=1; i<=9; i++) { 

int id = getResources().getIdentifier("drawableName", "drawable", context.getPackageName());

ImageView img = (ImageView) findViewById(id);
}

Here "drawableName" is the name of your image and leave "drawable" as is.

FindViewById Loop

Take One Integer array for R.id.imageView1......12 and pass its value
Like

private Integer[] Imgid = {R.id.imageview1,....,12  };

and use array

I want to use findViewById with strings as an Id

You can use this code to replace the findViewById(..). This should make it possible to use a string as identifier:

String BId = "button1"; // for example 
int id = getResources().getIdentifier(BId, "id", getPackageName());
// finds R.id.button1
bdatum0 = (Button) findViewById(id);