Question

我有一个Editext和一个Button（在Activity1中），当用户在Edittext中写入数字（n）并在Activity2中单击Button =＆gt; show（n）ImageView（空但可以从SD卡拍摄图像）。我该怎么办。任何人都可以帮助我？

在这里，我的代码。但它不起作用？我不知道。:(

活动A

public class MainActivity extends ActionBarActivity implements View.OnClickListener {
Button button;
EditText editext;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    button =(Button) findViewById(R.id.button1);
    editext=(EditText) findViewById(R.id.textview);


    button.setOnClickListener(this);
}

@Override
public void onClick(View v) {
    Intent myIntent = new Intent(MainActivity.this, ShowImages.class);
    myIntent.putExtra("intVariableName", Integer.parseInt(editext.getText().toString()));
    startActivity(myIntent);
}

}

活动B

 public class ShowImages extends Activity {

    ImageView[] imageView;
    private LinearLayout myLInearLayout;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_show_images);

        Intent intent1 = getIntent();
        int text1 = intent1.getIntExtra("intVariableName",0);
        showimage(text1);
    }
public void showimage(int b){

    myLInearLayout =(LinearLayout) findViewById(R.id.ln1);

    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
    myLInearLayout.setOrientation(LinearLayout.VERTICAL);
    for (int i=0;i<b;i++){

    imageView[i]=new ImageView(this)
    ;
    imageView[i].setImageResource(R.drawable.sample_2)
    ;
    myLInearLayout.addView(imageView[i]);
    }
    }}

Answer 1

使用Intent

将您的号码传递给Activity2

同时阅读this guide

传递数据后，从内存中读取图像。您可以使用BitmapFactory

要以编程方式添加ImageView，您必须从布局中对其进行充气：

imageView[i] = (ImageView)LayoutInflater.from(mContext).inflate(R.layout.image, myLInearLayout, false);
imageView[i].setImageResource(R.drawable.sample_2);
myLInearLayout.addView(imageView[i]);

R.layout.image：

<?xml version="1.0" encoding="utf-8"?>
<ImageView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/image"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>

如何在Editext中从输入添加imageView自动

1 个答案: