展示条件的EditText [英] show EditText on condition
问题描述
现在我有一个项目的想法,我想知道如果有人能帮助我在相同的逻辑。
Right now I have an idea for a project and I would like to know if anyone can help me on the same logic.
因此我需要创建或生成一个号码的EditText
根据达输入,也就是说,选择或输入一个数字,如5,给我5 的EditText
布局5型的值。他们知道,形式可以做到这一点?任何想法吗?
As such I need to create or generate a number of EditText
according to amount you enter, ie, to select or enter a number such as 5, show me 5 EditText
layout for type 5 values. They know that the form could accomplish this? Any ideas please?
我想这一定是一种用一个循环做,但不喜欢携带这种计算Java到XML。谢谢你。
I guess it must be a way to do it with a loop, but not like carrying this calculation Java to XML. Thank you.
推荐答案
下面是生成根据您输入的号码的EditText项目的例子。您可以忽略布局文件的滚动型我只是把它万一有人加了很多的EditText的项目,会去关闭屏幕。
Here is an example of generating EditText items based on the number you enter. You can ignore the scrollview in the layout file I just put it in case someone added a lot of EditText items that would go off the screen.
MainActivity.java
MainActivity.java
package com.example.test;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
import android.widget.TextView;
public class MainActivity extends Activity {
public static final String TAG = MainActivity.class.getSimpleName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final EditText count = (EditText) findViewById(R.id.count);
final TextView output = (TextView) findViewById(R.id.output);
final Button generate = (Button) findViewById(R.id.generate);
final Button values = (Button) findViewById(R.id.values);
final LinearLayout container = (LinearLayout) findViewById(R.id.container);
generate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int numberOfControlsToGenerate = 0;
try {
numberOfControlsToGenerate = Integer.parseInt(count.getText().toString().trim());
} catch (NumberFormatException e) {
Log.e(TAG, e.getMessage(), e);
}
if (numberOfControlsToGenerate > 0) {
if (container.getChildCount() > 0) {
container.removeAllViews();
}
for (int counter = 0; counter < numberOfControlsToGenerate; counter++) {
addEditText(container);
}
}
}
});
values.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String[] editTextValues = new String[container.getChildCount()];
StringBuilder editTextValuesBuilder = new StringBuilder();
for (int counter = 0; counter < container.getChildCount(); counter++) {
EditText child = (EditText) container.getChildAt(counter);
editTextValues[counter] = child.getText().toString().trim();
editTextValuesBuilder.append(editTextValues[counter]).append("\n");
}
output.setText(editTextValuesBuilder.toString());
}
});
}
private void addEditText(LinearLayout container) {
final LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
EditText editTextToAdd = new EditText(this);
editTextToAdd.setLayoutParams(params);
container.addView(editTextToAdd);
}
}
activity_main.xml中
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal"
android:orientation="vertical"
android:padding="16dp"
tools:context="${packageName}.${activityClass}" >
<EditText
android:id="@+id/count"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:imeOptions="actionDone"
android:inputType="number"
android:textSize="20sp" />
<Button
android:id="@+id/generate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Go" />
<Button
android:id="@+id/values"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Get Values" />
<TextView
android:id="@+id/output"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
</LinearLayout>
</ScrollView>
</LinearLayout>
这篇关于展示条件的EditText的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!