两种方法:

//第一种:LinearLayout.LayoutParamslp=newLinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,100);//第一个参数是宽,第二个参数是高LinearLayouttest_layout=(LinearLayout)findViewById(R.id.testlayout);test_layout.setLayoutParams(lp);//第二种LinearLayouttest_layout=(LinearLayout)findViewById(R.id.testlayout);//这里的LayoutParams导包要导android.view.ViewGroup.LayoutParams;LayoutParamslp=test_layout.getLayoutParams();lp.height=100;