12

我已经在布局 xml 上对 layout_weight 进行了硬编码。但现在我想从 java 代码中给出 layout_weight 和 weightSum。

我们如何在课堂上做到这一点?

 <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:weightSum="25" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="5"
        android:background="#F51215"
        android:paddingLeft="5dip"
        android:text="5" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="20"
        android:background="#1AC92B"
        android:paddingLeft="5dip"
        android:text="20" />
</LinearLayout>
4

6 回答 6

40

像这样的东西:

               ......
               LinearLayout layout = (LinearLayout)findViewById(YOUR_LAYOT_ID);
               layout.setWeightSum(25f);
               LinearLayout.LayoutParams lParams = (LinearLayout.LayoutParams) layout.getLayoutParams(); //or create new LayoutParams... 

               lParams.weight = 0.5f;
               .......
               someView.setLayoutParams(lParams);
               .......  
于 2012-07-23T11:31:58.907 回答
28
//set as like this below for different view set different float value.

myview.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT,5f));
于 2012-07-23T11:24:34.633 回答
11

我只是想添加一个示例,说明如何将 weightsum 与内部带有 TextViews 的 TableRow 一起使用:

           TableRow row = new TableRow(this);
           TableRow.LayoutParams params1 = new TableRow.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT, 10f);
           row.setLayoutParams(params1);
           row.setPadding(10, 10, 10, 10);
           row.setBackgroundColor(R.color.black);

           TextView tv = new TextView(this);
           TableRow.LayoutParams params2 = new TableRow.LayoutParams(0, LayoutParams.WRAP_CONTENT, 6f);
           tv.setLayoutParams(params2);
           tv.setTextSize(30);
           tv.setBackgroundResource(R.color.white);

           TextView tv2 = new TextView(this);
           TableRow.LayoutParams params3 = new TableRow.LayoutParams(0, LayoutParams.MATCH_PARENT, 2f);
           tv2.setLayoutParams(params3);
           tv2.setBackgroundResource(R.color.green);

           TextView tv3 = new TextView(this);
           TableRow.LayoutParams params4 = new TableRow.LayoutParams(0, LayoutParams.MATCH_PARENT, 2f);
           tv3.setLayoutParams(params4);
           tv3.setBackgroundResource(R.color.blue); 

在下面生成 TableRow。weightsum 为 10 的父级,子级的宽度则等于宽度的 60%、20% 和 20%。这里的高度是由高度为 30 的 TextView、tv 确定的。希望对某人有所帮助。:-)

文本

于 2014-12-05T15:35:29.230 回答
6

如果您想以编程方式更改父权重并且它是子属性,那么请在下面使用

这是您的设置方式。

 LinearLayout yourLayout=(LinearLayout)findViewById(R.id.container);
 yourLayout.setWeightSum(0.6f);
于 2016-02-10T12:38:04.250 回答
2

使用 LinearLayout 动态生成带权重的 TextView

LinearLayout lin_hoizontal = new LinearLayout(context);
lin_hoizontal.setOrientation(LinearLayout.HORIZONTAL);
lin_hoizontal.setLayoutParams(new android.widget.LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT, 10f));
lin_hoizontal.setPadding((int) context.getResources().getDimension(R.dimen.d_8), (int) context.getResources().getDimension(R.dimen.d_2), (int) context.getResources().getDimension(R.dimen.d_8), (int) context.getResources().getDimension(R.dimen.d_2));

android.widget.LinearLayout.LayoutParams params_label = new android.widget.LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.WRAP_CONTENT, 2.5f);
TextView txt_label = new TextView(context);
txt_label.setTextColor(context.getResources().getColor(R.color.listing_header_txt_color));//your text color
txt_label.setTextSize(TypedValue.COMPLEX_UNIT_PX, context.getResources().getDimension(R.dimen.d_13));
txt_label.setTypeface(Typeface.create("sans-serif-medium", Typeface.NORMAL));
txt_label.setLayoutParams(params_label);
txt_label.setPadding(0, 0, (int) context.getResources().getDimension(R.dimen.d_2), 0);
txt_label.setText("Label");


android.widget.LinearLayout.LayoutParams params_value = new android.widget.LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.WRAP_CONTENT, 7.5f);
TextView txt_value = new TextView(context);
txt_value.setTextColor(context.getResources().getColor(R.color.listing_header_txt_color));
txt_value.setTextSize(TypedValue.COMPLEX_UNIT_PX, context.getResources().getDimension(R.dimen.d_13));
txt_value.setTypeface(Typeface.create("sans-serif-light", Typeface.NORMAL));
txt_value.setLayoutParams(params_value);
txt_value.setPadding((int) context.getResources().getDimension(R.dimen.d_2), 0, 0, 0);
txt_value.setText("Value");

lin_hoizontal.addView(txt_label);
lin_hoizontal.addView(txt_value);
lin_hoizontal.addView(lin_main);
于 2017-02-23T07:02:30.103 回答
0

我喜欢 Ajii 的回答或:

((LinearLayout)view).setWeightSum(n);

对于个人视图权重:

((LinearLayout.LayoutParams)view.getLayoutParams()).weight = n;
  • 当然你可以做.. LinearLayout view = findViewById(R.id.view_name);
    (并放弃动态转换(LinearLayout))

  • 或替代………………..findViewById(R.id.view_name)用于上面的视图。

这些都对我有用。如果你想要尺寸文件中的价值:

<item name="new_weight" format="float" type="dimen">(your number)</item>

和:float n = getResources().getFloat(R.dimen.new_weight);

我相信您已经知道其中的大部分内容,但是...我曾经是新手,我一直很欣赏额外的描述。

于 2019-09-02T14:48:31.693 回答