如何在android
中将数组元素设置为动态创建的textviewMainActivity1：
public class MainActivity1 extends Activity implements OnClickListener {
EditText editText;
Button button;
public String Message;
public String[] mobileArray;
int len;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main1);
editText = (EditText) findViewById(R.id.editText1);
button = (Button) findViewById(R.id.button1);
button.setOnClickListener(this);
mobileArray = editText.getText().toString().split(",");
len = mobileArray.length;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
LinearLayout rl = (LinearLayout) findViewById(R.id.linear1);
TextView[] tv = new TextView[len];
for (int i = 0; i <=len; i++) {
tv[i] = new TextView(getBaseContext());
tv[i].setText("" +mobileArray[i] );
tv[i].setPadding(50, 50, 0, 0);
tv[i].setTextColor(Color.parseColor("#FF000000"));
rl.addView(tv[i]);
}
}
}
如何在android
中将数组元素设置为动态创建的textview这里everthing工作正常，它创建了dyanmic textview。但我需要在textview中显示数组元素。
当我尝试设置数组元素时，app停止工作。 请帮帮我。
这是我的编辑代码
我的日志猫是
12-26 02:13:44.897: E/AndroidRuntime(2779): FATAL EXCEPTION: main
12-26 02:13:44.897: E/AndroidRuntime(2779): Process: com.example.new_word, PID: 2779
12-26 02:13:44.897: E/AndroidRuntime(2779): java.lang.NullPointerException
12-26 02:13:44.897: E/AndroidRuntime(2779): at com.example.new_word.MainActivity1.onClick(MainActivity1.java:56)
12-26 02:13:44.897: E/AndroidRuntime(2779): at android.view.View.performClick(View.java:4438)
12-26 02:13:44.897: E/AndroidRuntime(2779): at android.view.View$PerformClick.run(View.java:18422)
12-26 02:13:44.897: E/AndroidRuntime(2779): at android.os.Handler.handleCallback(Handler.java:733)
12-26 02:13:44.897: E/AndroidRuntime(2779): at android.os.Handler.dispatchMessage(Handler.java:95)
12-26 02:13:44.897: E/AndroidRuntime(2779): at android.os.Looper.loop(Looper.java:136)
12-26 02:13:44.897: E/AndroidRuntime(2779): at android.app.ActivityThread.main(ActivityThread.java:5017)
12-26 02:13:44.897: E/AndroidRuntime(2779): at java.lang.reflect.Method.invokeNative(Native Method)
12-26 02:13:44.897: E/AndroidRuntime(2779): at java.lang.reflect.Method.invoke(Method.java:515)
12-26 02:13:44.897: E/AndroidRuntime(2779): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
12-26 02:13:44.897: E/AndroidRuntime(2779): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
12-26 02:13:44.897: E/AndroidRuntime(2779): at dalvik.system.NativeStart.main(Native Method)
12-26 02:13:47.467: I/Process(2779): Sending signal. PID: 2779 SIG: 9
Xml代码
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<LinearLayout
android:id="@+id/linear1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<EditText
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="32dp"
android:ems="10" >
<requestFocus />
</EditText>
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/editText1"
android:layout_centerHorizontal="true"
android:layout_marginTop="32dp"
android:text="Button" />
</LinearLayout>
</ScrollView>
答案 0 :(得分：1)
尝试以下内容：
if(!(editText.getText().toString().equals(""))){
TextView[] tv = new TextView[len];
for (int i = 0; i <len; i++) {
tv[i] = new TextView(getBaseContext());
tv[i].setText(mobileArray[i]);
tv[i].setPadding(50, 50, 0, 0);
tv[i].setTextColor(Color.parseColor("#000000"));
rl.addView(tv[i]);
}
}
答案 1 :(得分：1)
试试这个......
TextView[] tv = new TextView[len];
for (int i = 0; i < len; i++) {
tv[i] = new TextView(this);
tv[i].setText(mobileArray[i]);
tv[i].setPadding(50, 50, 0, 0);
tv[i].setTextColor(Color.parseColor("#FF000000"));
// tv[i].setTextColor(Color.BLACK);
rl.addView(tv[i]);
}
这里你使用了颜色＃000000，这意味着透明的颜色。因此您无法看到文本
答案 2 :(得分：0)
我可以指出的第一个错误是你的for循环条件：[也改变它]
for (int i = 0; i <len; i++)
如果错误仍然存在，请发布您的logcat;
同时更改此代码以显示该数组的文本：
tv[i] = new TextView(getBaseContext());
tv[i].setText(mobileArray[i]);
答案 3 :(得分：0)
试试这个，
TextView[] tv = new TextView[len];
for (int i = 0; i <len; i++)
{
tv[i] = new TextView(MainActivity1.this);
tv[i].setText(mobileArray[i]);
tv[i].setPadding(50, 50, 0, 0);
tv[i].setTextColor(Color.parseColor("#FF000000"));
rl.addView(tv[i]);
}
答案 4 :(得分：0)
试试这个示例代码 -
final int N = 10; // total number of textviews to add
final TextView[] tv = new TextView[N]; // create an empty array;
for (int i = 0; i < N; i++) {
// create a new textview
final TextView rowTextView = new TextView(this);
// set some properties of rowTextView or something
rowTextView.setText("This is row #" + i);
// add the textview to the linearlayout
rl.addView(rowTextView);
// save a reference to the textview for later
tv[i] = rowTextView;
}
答案 5 :(得分：0)
使用此代码可以帮助您
int []a=new int[4];
a[0]=1;
a[1]=2;
a[2]=3;
a[3]=4;
for(int i=1;i<5;i++)
{
str4=str4+a.toString().valueOf(i)+"\n";
}
RelativeLayout rl=(RelativeLayout) findViewById(R.id."**Your layout ID**");
TextView textDynamic = new TextView(this);
textDynamic.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));
textDynamic.setText(str4);
textDynamic.setBackgroundColor(Color.GREEN);
textDynamic.setTextColor(Color.RED);
textDynamic.setTextScaleX(2);
textDynamic.setTextSize(20);
textDynamic.isClickable();
textDynamic.setPadding(10, 10, 10, 10);
rl.addView(textDynamic);