Android布局动态发布

Question

尝试将textView和按钮动态添加到LinearLayout中，然后将此布局添加到setContentView使用的主布局中。

所以就像这样

T-文本视图

B键

Ltb -包含T和B的布局

Lm -包含Ltb的主布局

然后使用this.setContentView(Lm)显示结果

角色:t必须在左边。B必须位于布局内屏幕的右侧。

以上所有元素都是动态声明的，而不使用布局xml。

实际结果:显示精细。但是当我输入比屏幕宽度更长的文本时，按钮就会被推到屏幕外，然后就消失了。

问题是我的动态布局做错了什么吗？

这里的代码：

public SearchBar(Context c){
    et=new EditText(c);
    bt=new Button(c);
    et.setHint("added et");
    bt.setText("added btn");


    ll=new LinearLayout(c);
    setLinearLayout();

    et.setLayoutParams(flowLeft());
    bt.setLayoutParams(flowRight());

    ll.addView(et);
    ll.addView(bt);
}


private RelativeLayout.LayoutParams flowRight(){
    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
            LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
        //params.weight = 1.0f;
        //params.gravity=Gravity.RIGHT;
        params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, RelativeLayout.TRUE);


    return params;     
}

private RelativeLayout.LayoutParams flowLeft(){
    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
            LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
        //params.weight = 1.0f;
        //params.gravity=Gravity.RIGHT;
        params.addRule(RelativeLayout.ALIGN_PARENT_LEFT, RelativeLayout.TRUE);


    return params;     
}

private void setLinearLayout(){
    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
            LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
    ll.setOrientation(LinearLayout.HORIZONTAL); 
    ll.setLayoutParams(params);
}

Answer 1

// try this way, hope this will help you...

@Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        LinearLayout ltb = new LinearLayout(this);

        TextView T = new TextView(this);

        Button B =new Button(this);

        LinearLayout.LayoutParams ltbParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT);
        LinearLayout.LayoutParams TParms = new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.WRAP_CONTENT,1f);

        LinearLayout.LayoutParams BParms = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);

        T.setLayoutParams(TParms);
        B.setLayoutParams(BParms);
        T.setText("Demo Text Demo Text Demo Text Demo Text Demo Text Demo Text Demo Text Demo Text Demo Text Demo Text Demo Text Demo Text Demo Text Demo Text Demo Text Demo Text Demo Text Demo Text Demo Text Demo Text");
        B.setText("Button");
        ltb.addView(T);
        ltb.addView(B);
        ltb.setLayoutParams(ltbParams);

        setContentView(ltb);

}

Answer 2

就像这样。这可能对你有帮助。

Ltb.setWeightSum(100);
Ltb.setOrientation(LinearLayout.HORIZONTAL);

T.setLayoutParams(new LinearLayout.LayoutParams(0,LayoutParams.MATCH_PARENT,50));

B.setLayoutParams(new LinearLayout.LayoutParams(0,LayoutParams.MATCH_PARENT,50));