如何将编辑文本值传递给适配器类 [英] How to pass the edit text value to adapter class

问题描述

我想将文本值从下面的活动传递给TextAdapter类.
公共类SecondActivity扩展了Activity {

I want to pass the text value from below activity to TextAdapter class.
public class SecondActivity extends Activity {

EditText et1;
TextView t1,t2;
Button b1,b2;
String result;
Context context = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sec);
et1 = (EditText) this.findViewById(R.id.editText1);
t1 = (TextView) this.findViewById(R.id.textView1);
t2 = (TextView) this.findViewById(R.id.textView2);
b1 = (Button) this.findViewById(R.id.button1);
b2 = (Button) this.findViewById(R.id.button2);
b1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
t2.setText(et1.getText());
}
});
b2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(v.getContext(),ThirdActivity.class);
startActivity(i);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

此值将添加到数组中 公共类TextAdapter扩展了PagerAdapter {

This values are to be added in the array public class TextAdapter extends PagerAdapter{

    private String[] textViewer = new String[]{
"Hai"--------------(Here i want the edit text value)
};
public TextAdapter (Context context){
this.context= context;
}

@Override
public int getCount() {
return textViewer.length;
}

@Override
public boolean isViewFromObject(View view, Object object) {
return view==((TextView)object);
}
public Object instantiateItem(ViewGroup container, int position) {
TextView textView = new TextView(context);
textView.setText(textViewer[position]);
((ViewPager) container).addView(textView, 0);
return textView;
}

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((TextView) object);
}

}

推荐答案

在活动中创建上下文，并在PageAdapter类中传递上下文，如下所示:

Create the context in the activity and pass the Context in the PageAdapter class like this:

public class MainActivity extends Activity {

public EditText editText = null;
private Context context = null;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
 editText = (EditText)findViewById(R.id.xxxx);

 context = this;

 AnotherClass anotherClassObject = new AnotherClass(context)
}

您的页面适配器类如下所示:

Where your page adapter class will be somewhat like this:

public class AnotherClass extends PageAdapter {
public AnotherClass(Context context) 
    {
       context.editText.getText().toString().trim();  // Here you will get the edittext value
    }
}

它可能会要求您键入强制转换上下文，在这种情况下，请使用Activity类名将其强制转换.

It may ask you to type cast the context, in that case type cast it with Activity class name.

已更新:-

公开editText并调用

Make the editText public and call

((SecondActivity)context).et1.getText().toString().trim();

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