安卓:如何以编程方式设置layout_constraintRight_toRightOf "parent“开发者社区

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<TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:maxWidth="260dp"
        android:textColor="#FFF"
        android:textSize="16sp"
        app:layout_constraintLeft_toLeftOf="@+id/parent"
        app:layout_constraintTop_toBottomOf="@id/message_date"
        android:id="@+id/text_main"
        />

ConstraintLayout constraintLayout;
ConstraintSet constraintSet;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    constraintLayout = (ConstraintLayout) findViewById(R.id.activity_main_constraint_layout);
    Button button = new Button(this);
    button.setText("Hello");
    constraintLayout.addView(button);
    constraintSet = new ConstraintSet();
    constraintSet.clone(constraintLayout);
    constraintSet.connect(button.getId(), ConstraintSet.LEFT, constraintLayout.getId(), ConstraintSet.RIGHT, 0);
    constraintSet.constrainDefaultHeight(button.getId(), 200);
    constraintSet.applyTo(constraintLayout);
}

app:layout_constraintLeft_toLeftOf="@+id/parent"

set.connect(YOURVIEW.getId(),ConstraintSet.LEFT,ConstraintSet.PARENT_ID,ConstraintSet.LEFT,0);

layout_constraintLeft_toRightOf="@+id/parent"

set.connect(YOURVIEW.getId(),ConstraintSet.LEFT,ConstraintSet.PARENT_ID,ConstraintSet.RIGHT,0);

  LayoutParams layoutParams = (LayoutParams) viewToChange.getLayoutParams();
    layoutParams.leftToLeft = anotherViewId;
    layoutParams.rightToRight =anotherViewId;
    layoutParams.topToTop = anotherViewId;
    layoutParams.bottomToBottom = anotherViewId;
    layoutParams.startToStart =anotherViewId;
    layoutParams.endToEnd = anotherViewId;
    viewToChange.setLayoutParams(layoutParams);

class MyLayout(context: Context) : ConstraintLayout(context) {
    fun show() {
        val view = ImageView(context)
        addView(view)
        val params = view.layoutParams as ConstraintLayout.LayoutParams

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问 安卓:如何以编程方式设置layout_constraintRight_toRightOf "parent“ EN

回答 4

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