CODEWITHSUNDEEP
javaandroidandroid-layoutandroid-xml
Z Smith
Z Smith

Reputation: 252

repeat LinearLayout with slight changes

I have a vertical LinearLayout, which I want to fill with horizontal LinearLayouts (which act like rows). Each of these should effectively be identical, except several items within them use a number, which should increase each time.

For example:

<LinearLayout android:id="@+id/row1" >
    <SeekBar
        android:id="@+id/seekBar"
        android:tag="1"
    />
</LinearLayout>
<LinearLayout android:id="@+id/row2" >
    <SeekBar
        android:id="@+id/seekBar"
        android:tag="2"
    />
</LinearLayout>
<LinearLayout android:id="@+id/row3" >
    <SeekBar
        android:id="@+id/seekBar"
        android:tag="3"
    />
</LinearLayout>

In JavaScript, I might use something like this to 'automate' their creation:

for (var i = 0; i < count; i++) {
    child = document.createElement("div");
    child.id = "row" + i;
    parent.appendChild(child);
}

Is there a way to 'automate' the creation of these, such that I can just have a single 'model' of one, then iterate over it several times, 'passing in' the number each time? I can use a Java-based or XML-based solution.

I've tried using for each one, which solved part of the problem, but couldn't find an effective way to 'pass in' a different number each time. (The numbers are to identify the inputs within the rows from Java - if there's a better way to manage this, that could also be helpful).

Upvotes: 0

Views: 187

Answers (1)

slee
slee

Reputation: 239

You can build Layout by Java code in the Activity - onCreate

You can dynamic modify of layout
For example: Build 3 seekbars and delete the first seekbar by id. 

public class MainActivity extends AppCompatActivity {

    ArrayList<Integer> seekbarsID;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        seekbarsID = new ArrayList<>();

        LinearLayout layout = new LinearLayout(this);

        layout.setOrientation(LinearLayout.VERTICAL);
        layout.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));

        for (int i = 1; i < 4; i++) {
            SeekBar seekbar = new SeekBar(this);

            int id;
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
               id = View.generateViewId();

            }else{
                id = 99999999+i;

            }
                seekbar.setId(id);
                seekbarsID.add (id);

            seekbar.setTag(i);
            layout.addView(seekbar);



        }


        setContentView(layout);
        layout.removeView(findViewById(seekbarsID.get(0)));

    }
}

Upvotes: 1

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