Réponses:
Juste un exemple basique:
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT, RelativeLayout.TRUE);
Button button1;
button1.setLayoutParams(params);
params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.RIGHT_OF, button1.getId());
Button button2;
button2.setLayoutParams(params);
Comme vous pouvez le voir, voici ce que vous devez faire:
RelativeLayout.LayoutParamsobjet.addRule(int)ou addRule(int, int)pour définir les règles. La première méthode est utilisée pour ajouter des règles qui ne nécessitent pas de valeurs.ViewGroup.LayoutParams. Si vous le souhaitez plus court, ajoutez simplement une importation qui inclut RelativeLayout.LayoutParams.
RelativeLayout layout = new RelativeLayout(this);
RelativeLayout.LayoutParams labelLayoutParams = new RelativeLayout.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
layout.setLayoutParams(labelLayoutParams);
// If you want to add some controls in this Relative Layout
labelLayoutParams = new RelativeLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
labelLayoutParams.addRule(RelativeLayout.CENTER_IN_PARENT);
ImageView mImage = new ImageView(this);
mImage.setBackgroundResource(R.drawable.popupnew_bg);
layout.addView(mImage,labelLayoutParams);
setContentView(layout);
Quelque chose comme ça..
RelativeLayout linearLayout = (RelativeLayout) findViewById(R.id.widget43);
// ListView listView = (ListView) findViewById(R.id.ListView01);
LayoutInflater inflater = (LayoutInflater) this
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// View footer = inflater.inflate(R.layout.footer, null);
View footer = LayoutInflater.from(this).inflate(R.layout.footer,
null);
final RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.FILL_PARENT,
RelativeLayout.LayoutParams.FILL_PARENT);
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, 1);
footer.setLayoutParams(layoutParams);
Que diriez-vous de tirer simplement les paramètres de mise en page de la vue elle-même si vous l'avez créée.
$((RelativeLayout)findViewById(R.id.imageButton1)).getLayoutParams();
J'espère que le code ci-dessous vous aidera. Il créera un EditText et un bouton de connexion. Les deux placés relativement. Tout est fait dans MainActivity.java.
package com.example.atul.allison;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.RelativeLayout;
import android.widget.Button;
import android.graphics.Color;
import android.widget.EditText;
import android.content.res.Resources;
import android.util.TypedValue;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Layout
RelativeLayout atulsLayout = new RelativeLayout(this);
atulsLayout.setBackgroundColor(Color.GREEN);
//Button
Button redButton = new Button(this);
redButton.setText("Log In");
redButton.setBackgroundColor(Color.RED);
//Username input
EditText username = new EditText(this);
redButton.setId(1);
username.setId(2);
RelativeLayout.LayoutParams buttonDetails= new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT
);
RelativeLayout.LayoutParams usernameDetails= new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT
);
//give rules to position widgets
usernameDetails.addRule(RelativeLayout.ABOVE,redButton.getId());
usernameDetails.addRule(RelativeLayout.CENTER_HORIZONTAL);
usernameDetails.setMargins(0,0,0,50);
buttonDetails.addRule(RelativeLayout.CENTER_HORIZONTAL);
buttonDetails.addRule(RelativeLayout.CENTER_VERTICAL);
Resources r = getResources();
int px = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 200,r.getDisplayMetrics());
username.setWidth(px);
//Add widget to layout(button is now a child of layout)
atulsLayout.addView(redButton,buttonDetails);
atulsLayout.addView(username,usernameDetails);
//Set these activities content/display to this view
setContentView(atulsLayout);
}
}