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Comment ajouter un TextView à un LinearLayout de manière dynamique dans Android?

J'essaie d'ajouter une TextView à une LinearLayout de manière dynamique, comme dans le code suivant, mais elle n'apparaît pas lorsque j'exécute l'application?

setContentView(R.layout.advanced);

m_vwJokeLayout=(LinearLayout) this.findViewById(R.id.m_vwJokeLayout);
m_vwJokeEditText=(EditText) this.findViewById(R.id.m_vwJokeEditText);
m_vwJokeButton=(Button) this.findViewById(R.id.m_vwJokeButton);

TextView tv=new TextView(this);
tv.setText("test");
this.m_vwJokeLayout.addView(tv);

Quel est le problème?

androidtextviewandroid-linearlayout
49
Adham
LayoutParams lparams = new LayoutParams(
   LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
TextView tv=new TextView(this);
tv.setLayoutParams(lparams);
tv.setText("test");
this.m_vwJokeLayout.addView(tv);

Vous pouvez changer lparams selon vos besoins

77
user479211

Voici une réponse plus générale pour les futurs téléspectateurs de cette question. La mise en page que nous allons faire est ci-dessous:

enter image description here

Méthode 1: Ajouter TextView à LinearLayout existant

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.dynamic_linearlayout);

    LinearLayout linearLayout = (LinearLayout) findViewById(R.id.ll_example);

    // Add textview 1
    TextView textView1 = new TextView(this);
    textView1.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
            LayoutParams.WRAP_CONTENT));
    textView1.setText("programmatically created TextView1");
    textView1.setBackgroundColor(0xff66ff66); // hex color 0xAARRGGBB
    textView1.setPadding(20, 20, 20, 20);// in pixels (left, top, right, bottom)
    linearLayout.addView(textView1);

    // Add textview 2
    TextView textView2 = new TextView(this);
    LayoutParams layoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT,
            LayoutParams.WRAP_CONTENT);
    layoutParams.gravity = Gravity.RIGHT;
    layoutParams.setMargins(10, 10, 10, 10); // (left, top, right, bottom)
    textView2.setLayoutParams(layoutParams);
    textView2.setText("programmatically created TextView2");
    textView2.setTextSize(TypedValue.COMPLEX_UNIT_SP, 18);
    textView2.setBackgroundColor(0xffffdbdb); // hex color 0xAARRGGBB
    linearLayout.addView(textView2);
}

Notez que pour LayoutParams, vous devez spécifier le type de présentation pour l’importation, comme dans 

import Android.widget.LinearLayout.LayoutParams;

Sinon, vous devez utiliser LinearLayout.LayoutParams dans le code. 

Voici le xml:

<LinearLayout xmlns:Android="http://schemas.Android.com/apk/res/Android"
    Android:id="@+id/ll_example"
    Android:layout_width="match_parent"
    Android:layout_height="match_parent"
    Android:background="#ff99ccff"
    Android:orientation="vertical" >

</LinearLayout>

Méthode 2: Créer à la fois LinearLayout et TextView par programme

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // NOTE: setContentView is below, not here

    // Create new LinearLayout
    LinearLayout linearLayout = new LinearLayout(this);
    linearLayout.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
            LayoutParams.MATCH_PARENT));
    linearLayout.setOrientation(LinearLayout.VERTICAL);
    linearLayout.setBackgroundColor(0xff99ccff);

    // Add textviews
    TextView textView1 = new TextView(this);
    textView1.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
            LayoutParams.WRAP_CONTENT));
    textView1.setText("programmatically created TextView1");
    textView1.setBackgroundColor(0xff66ff66); // hex color 0xAARRGGBB
    textView1.setPadding(20, 20, 20, 20); // in pixels (left, top, right, bottom)
    linearLayout.addView(textView1);

    TextView textView2 = new TextView(this);
    LayoutParams layoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT,
            LayoutParams.WRAP_CONTENT);
    layoutParams.gravity = Gravity.RIGHT;
    layoutParams.setMargins(10, 10, 10, 10); // (left, top, right, bottom)
    textView2.setLayoutParams(layoutParams);
    textView2.setText("programmatically created TextView2");
    textView2.setTextSize(TypedValue.COMPLEX_UNIT_SP, 18);
    textView2.setBackgroundColor(0xffffdbdb); // hex color 0xAARRGGBB
    linearLayout.addView(textView2);

    // Set context view
    setContentView(linearLayout);
}

Méthode 3: ajouter par programme une présentation XML à une autre présentation XML

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.dynamic_linearlayout);

    LayoutInflater inflater = (LayoutInflater) getApplicationContext().getSystemService(
            Context.LAYOUT_INFLATER_SERVICE);
    View view = inflater.inflate(R.layout.dynamic_linearlayout_item, null);
    FrameLayout container = (FrameLayout) findViewById(R.id.flContainer);
    container.addView(view);
}

Voici dynamic_linearlayout.xml:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:Android="http://schemas.Android.com/apk/res/Android"
    Android:id="@+id/flContainer"
    Android:layout_width="match_parent"
    Android:layout_height="match_parent" >

</FrameLayout>

Et voici le dynamic_linearlayout_item.xml à ajouter:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:Android="http://schemas.Android.com/apk/res/Android"
    Android:id="@+id/ll_example"
    Android:layout_width="match_parent"
    Android:layout_height="match_parent"
    Android:background="#ff99ccff"
    Android:orientation="vertical" >

    <TextView
        Android:layout_width="wrap_content"
        Android:layout_height="wrap_content"
        Android:background="#ff66ff66"
        Android:padding="20px"
        Android:text="programmatically created TextView1" />

    <TextView
        Android:layout_width="wrap_content"
        Android:layout_height="wrap_content"
        Android:background="#ffffdbdb"
        Android:layout_gravity="right"
        Android:layout_margin="10px"
        Android:textSize="18sp"
        Android:text="programmatically created TextView2" />

</LinearLayout>
38
Suragch

J'ai personnalisé plus de code @Suragch. Ma sortie ressemble 

 enter image description here

J'ai écrit une méthode pour arrêter la redondance du code. 

TextView createATextView(int layout_widh, int layout_height, int align,
        String text, int fontSize, int margin, int padding) {

    TextView textView_item_name = new TextView(this);

    // LayoutParams layoutParams = new LayoutParams(
    // LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    // layoutParams.gravity = Gravity.LEFT;
    RelativeLayout.LayoutParams _params = new RelativeLayout.LayoutParams(
            layout_widh, layout_height);

    _params.setMargins(margin, margin, margin, margin);
    _params.addRule(align);
    textView_item_name.setLayoutParams(_params);

    textView_item_name.setText(text);
    textView_item_name.setTextSize(TypedValue.COMPLEX_UNIT_SP, fontSize);
    textView_item_name.setTextColor(Color.parseColor("#000000"));
    // textView1.setBackgroundColor(0xff66ff66); // hex color 0xAARRGGBB
    textView_item_name.setPadding(padding, padding, padding, padding);

    return textView_item_name;

}

On peut appeler comme 

createATextView(LayoutParams.WRAP_CONTENT,
            LayoutParams.WRAP_CONTENT, RelativeLayout.ALIGN_PARENT_RIGHT,
            subTotal.toString(), 20, 10, 20);

Vous pouvez maintenant ajouter cela à un RelativeLayout de manière dynamique. LinearLayout est également identique, il suffit d'ajouter une orientation. 

    RelativeLayout primary_layout = new RelativeLayout(this);

    LayoutParams layoutParam = new LayoutParams(LayoutParams.MATCH_PARENT,
            LayoutParams.MATCH_PARENT);

    primary_layout.setLayoutParams(layoutParam);

    // FOR LINEAR LAYOUT SET ORIENTATION
    // primary_layout.setOrientation(LinearLayout.HORIZONTAL);

    // FOR BACKGROUND COLOR 
    primary_layout.setBackgroundColor(0xff99ccff);

    primary_layout.addView(createATextView(LayoutParams.WRAP_CONTENT,
            LayoutParams.WRAP_CONTENT, RelativeLayout.ALIGN_LEFT, list[i],
            20, 10, 20));
    primary_layout.addView(createATextView(LayoutParams.WRAP_CONTENT,
            LayoutParams.WRAP_CONTENT, RelativeLayout.ALIGN_PARENT_RIGHT,
            subTotal.toString(), 20, 10, 20));
6
Shihab Uddin
TextView rowTextView = (TextView)getLayoutInflater().inflate(R.layout.yourTextView, null);
        rowTextView.setText(text);
        layout.addView(rowTextView);

Voici comment j'utilise ceci:

 private List<Tag> tags = new ArrayList<>();


if(tags.isEmpty()){
        Gson gson = new Gson();
        Type listType = new TypeToken<List<Tag>>() {
        }.getType();
        tags = gson.fromJson(tour.getTagsJSONArray(), listType);
    }



if (flowLayout != null) {
        if(!tags.isEmpty()) {
            Log.e(TAG, "setTags: "+ flowLayout.getChildCount() );
            flowLayout.removeAllViews();
            for (Tag tag : tags) {
                FlowLayout.LayoutParams lparams = new FlowLayout.LayoutParams(FlowLayout.LayoutParams.WRAP_CONTENT, FlowLayout.LayoutParams.WRAP_CONTENT);
                lparams.setMargins(PixelUtil.dpToPx(this, 0), PixelUtil.dpToPx(this, 5), PixelUtil.dpToPx(this, 10), PixelUtil.dpToPx(this, 5));// llp.setMargins(left, top, right, bottom);
                TextView rowTextView = (TextView) getLayoutInflater().inflate(R.layout.tag, null);
                rowTextView.setText(tag.getLabel());
                rowTextView.setLayoutParams(lparams);
                flowLayout.addView(rowTextView);
            }
        }
        Log.e(TAG, "setTags: after "+ flowLayout.getChildCount() );
    }

Et voici ma balise nommée TextView personnalisée:

<?xml version="1.0" encoding="utf-8"?><TextView xmlns:Android="http://schemas.Android.com/apk/res/Android"
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"    
Android:textSize="10dp"
Android:textAllCaps="true"
fontPath="@string/font_light"
Android:background="@drawable/tag_shape"
Android:paddingLeft="11dp"
Android:paddingTop="6dp"
Android:paddingRight="11dp"
Android:paddingBottom="6dp">

c'est mon tag_shape:

<shape xmlns:Android="http://schemas.Android.com/apk/res/Android"
Android:shape="rectangle">
<solid Android:color="#f2f2f2" />
<corners Android:radius="15dp" />
</shape>

effet:

 enter image description here

Ailleurs, j'ajoute des textviews avec des noms de langues à partir de dialogues avec listview:

 enter image description here

 enter image description here

5
Krzysztof Dziuba

disposition :

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:Android="http://schemas.Android.com/apk/res/Android"
 Android:layout_width="match_parent"
 Android:layout_height="match_parent" >

  <LinearLayout
      Android:id="@+id/layoutTest"
      Android:layout_width="match_parent"
      Android:layout_height="wrap_content"
      Android:orientation="vertical"
      >
  </LinearLayout>
</RelativeLayout>

fichier de classe :

setContentView(R.layout.layout_dynamic);
layoutTest=(LinearLayout)findViewById(R.id.layoutTest);
TextView textView = new TextView(getApplicationContext());

textView.setText("testDynamic textView");
layoutTest.addView(textView);
1
jeet parmar

Si vous utilisez Linearlayout. ses paramètres doivent être "wrap_content" pour ajouter des données dynamiques dans votre layout XML. Si vous utilisez Match ou Fill parent, vous ne pouvez pas voir le résultat.

Ça devrait être comme ça. 

    <LinearLayout xmlns:Android="http://schemas.Android.com/apk/res/Android"
        Android:layout_width="wrap_content" Android:layout_height="wrap_content">
        <ListView
            Android:id="@+id/list"
            Android:layout_width="match_parent"
            Android:layout_height="match_parent" >
        </ListView>
    </LinearLayout>
0
Hari krishna Andhra Pradesh