我正在尝试用代码将TextViews
添加到我的xml定义的布局中。我有一个xml-sheet,其中定义了很多Views
。但是我必须在代码中添加一些视图,所以在xml-sheet中创建一个LinearLayout
:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:id="@+id/info"
android:layout_height="wrap_content"
android:orientation="vertical">
</LinearLayout>
在这个布局中,我喜欢添加我的TextView
View linearLayout = findViewById(R.id.info);
//LinearLayout layout = (LinearLayout) findViewById(R.id.info);
TextView valueTV = new TextView(this);
valueTV.setText("hallo hallo");
valueTV.setId(5);
valueTV.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
((LinearLayout) linearLayout).addView(valueTV);
但我只得到以下错误消息:
: java.lang.ClassCastException: android.widget.TextView
我该怎么做呢?
谢谢你的帮助。马丁
发布于 2010-07-08 23:36:08
尝试使用
LinearLayout linearLayout = (LinearLayout)findViewById(R.id.info);
...
linearLayout.addView(valueTV);
还要确保您正在创建的布局参数是LinearLayout.LayoutParams...
发布于 2011-09-16 21:09:40
嘿,我已经检查了你的代码,你的代码中没有严重的错误。这是完整的代码:
main.xml:-
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:id="@+id/info"
android:layout_height="wrap_content"
android:orientation="vertical">
</LinearLayout>
这是Stackoverflow.java
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.LinearLayout;
import android.widget.TextView;
public class Stackoverflow extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
View linearLayout = findViewById(R.id.info);
//LinearLayout layout = (LinearLayout) findViewById(R.id.info);
TextView valueTV = new TextView(this);
valueTV.setText("hallo hallo");
valueTV.setId(5);
valueTV.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT));
((LinearLayout) linearLayout).addView(valueTV);
}
}
复制此代码,然后运行它。它是完全没有错误的。多保重。
发布于 2016-06-16 17:28:24
for(int j=0;j<30;j++) {
LinearLayout childLayout = new LinearLayout(MainActivity.this);
LinearLayout.LayoutParams linearParams = new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
childLayout.setLayoutParams(linearParams);
TextView mType = new TextView(MainActivity.this);
TextView mValue = new TextView(MainActivity.this);
mType.setLayoutParams(new TableLayout.LayoutParams(
LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT, 1f));
mValue.setLayoutParams(new TableLayout.LayoutParams(
LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT, 1f));
mType.setTextSize(17);
mType.setPadding(5, 3, 0, 3);
mType.setTypeface(Typeface.DEFAULT_BOLD);
mType.setGravity(Gravity.LEFT | Gravity.CENTER);
mValue.setTextSize(16);
mValue.setPadding(5, 3, 0, 3);
mValue.setTypeface(null, Typeface.ITALIC);
mValue.setGravity(Gravity.LEFT | Gravity.CENTER);
mType.setText("111");
mValue.setText("111");
childLayout.addView(mValue, 0);
childLayout.addView(mType, 0);
linear.addView(childLayout);
}
https://stackoverflow.com/questions/3204852
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