Question

我想我没有正确描述我在question part 1中的意思。所以我在这里输入更多细节。请看一看。

activityOne.java

EditText get_input;
Button get_button;
String display;
int image_id;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);

    get_input=(EditText)findViewById(R.id.input_year);
    get_button=(Button)findViewById(R.id.button_submit);

    get_button.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {


            int store_get_input=Integer.parseInt(get_input.getText().toString());
            int results;
            results=store_get_input%12;


             if (results == 0) {

                    display = "Your number is "store_get_input";
                    image_id=0;

                } else if (result ==1){

                    display = "Your number is "store_get_input";
                    image_id=1;

                }else{

                    display = "Your number is others";
                    image_id=3;
                }

            Intent home_intent=new Intent(getApplicationContext(),Result_page.class);
            home_intent.putExtra("home_store_get_input",display);
            home_intent.putExtra("home_store_image_src",image_id);
            startActivity(home_intent);

        }
    });
}

activityTwo.java

public class Result_page extends AppCompatActivity {

TextView get_result;
ImageView get_image;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_result_page);


    get_result=(TextView)findViewById(R.id.display_result);
    get_image=(ImageView)findViewById(R.id.image_view);

    Intent result_intent=getIntent();
    String text=result_intent.getStringExtra("home_store_get_input");

    get_result.setText(text);// display what the user has enter

    // get_image.setImageResource  
    //OR other coding to display imageview by using the image_id from activty 1? 
}

从两个java文件中，我认为你们阅读的内容会更清晰，更容易。所以我坚持使用activityTwo.java，我需要键入一些代码，以便通过uising int image_id或其他编码来显示imageview。

Answer 1

在第二个活动中将字符串转换为整数，并使用开关案例根据该数字选择图像。喜欢：

Intent result_intent = getIntent();
String text = result_intent.getStringExtra("home_store_get_input");
try {
    int number = Integer.parseInt(text);
} catch(NumberFormatException e) {
   //Exception
}
int imageId = R.Drawable.default_image;
switch(number) {
    case 1:
           imageId = R.drawable.image1;
           break;
    case 2:
           imageId = R.drawable.image2;
           break;
           ........so on
}
ImageView.setImageResource(imageId);

Answer 2

我认为你不需要2个重复的问题。

方法1： https://stackoverflow.com/a/38342798/2670771

方法2： 在活动1中，只需将图片ID发送到活动2

if (results == 0) { 
   display = "Your number is "store_get_input";
   image_id = R.drawable.image0; 
} else if {...}

在活动2中，从意图中获取图像ID

int defaultIdWhenCouldNotFindImageSourceId = -1;//should use a negative value 
int imageId = result_intent.getIntExtra("home_store_image_src", defaultIdWhenCouldNotFindImageSourceId);
if( defaultIdWhenCouldNotFindImageSourceId != imageId) {
    //when you can find an valid image id in intent extra, display it
    get_image.setImageResource(imageId);
}

Android Studio onClick按钮在另一个活动中显示ImageView（第2部分）

2 个答案: