Question

我有一个带有6个图像按钮的页面，当用户点击每个图像按钮时，将转到详细页面，其中包含带有额外信息的图标的图像。问题是如何在详细页面中设置图像对应于用户单击的图像按钮？例如，当用户点击详细页面中的图像按钮1时，在单击详细信息页面中的图像按钮2时看到图像按钮1，我们有button2的图像，如何在活动页面代码中定义此属性？

这是我的代码对应于6个图像按钮：

//实现OnClickListener接口 public class Destination扩展ActionBarActivity 实现View.OnClickListener

{

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);


    setContentView(R.layout.destination);


    //get the Button reference
    //Button is a subclass of View
    //buttonClick if from main.xml "@+id/buttonClick"
    View btnClick = findViewById(R.id.image1);
    View btnClick2 = findViewById(R.id.image2);
    View btnClick3 = findViewById(R.id.image3);
    View btnClick4 = findViewById(R.id.image4);
    View btnClick5 = findViewById(R.id.image5);
    View btnClick6 = findViewById(R.id.image6);
    btnClick.setOnClickListener(this);
    btnClick2.setOnClickListener(this);
    btnClick3.setOnClickListener(this);
    btnClick4.setOnClickListener(this);
    btnClick5.setOnClickListener(this);
    btnClick6.setOnClickListener(this);
}

//override the OnClickListener interface method
@Override
public void onClick(View arg0) {
    if (arg0.getId() == R.id.image1) {
        //define a new Intent for the second Activity
        Intent intent = new Intent(this, DestinationTherapy.class);
        //start the second Activity
        this.startActivity(intent);
    } else if (arg0.getId() == R.id.image2) {
        //define a new Intent for the second Activity
        Intent intent = new Intent(this, DestinationDetail.class);
        //start the second Activity
        this.startActivity(intent);
    } else  if (arg0.getId() == R.id.image3) {
        //define a new Intent for the second Activity
        Intent intent = new Intent(Destination.this, DestinationDetail.class);
        //start the second Activity
        this.startActivity(intent);
    } else if (arg0.getId() == R.id.image4) {
        //define a new Intent for the second Activity
        Intent intent = new Intent(Destination.this, DestinationDetail.class);
        //start the second Activity
        this.startActivity(intent);
    } else if (arg0.getId() == R.id.image5) {
        //define a new Intent for the second Activity
        Intent intent = new Intent(Destination.this, DestinationDetail.class);
        //start the second Activity
        this.startActivity(intent);
    } else if (arg0.getId() == R.id.image6) {
        //define a new Intent for the second Activity
        Intent intent = new Intent(Destination.this, DestinationDetail.class);
        //start the second Activity
        this.startActivity(intent);
    }
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.detail, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        startActivity(new Intent(this, Setting.class));
        return true;
    } else if (id == R.id.action_menu) {
        startActivity(new Intent(this, MainActivity.class));
        return true;
    }
    return super.onOptionsItemSelected(item);
}

}

目标详情活动：

public class DestinationDetail extends ActionBarActivity
    implements View.OnClickListener

{

    View btnClick = findViewById(R.id.emergency4);
    btnClick.setOnClickListener(DestinationDetail.this);
    View btnClick1 = findViewById(R.id.back2);
    btnClick1.setOnClickListener(DestinationDetail.this);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.detail, menu);
    return true;
}

public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        startActivity(new Intent(this, SettingActivity.class));
        return true;
    }
    if (id == R.id.action_menu) {
        startActivity(new Intent(this, MainActivity.class));
        return true;
    }
    return super.onOptionsItemSelected(item);
}

public void onClick(View arg0) {
    if (arg0.getId() == R.id.emergency4) {
        //define a new Intent for the second Activity
        Intent intent = new Intent(this, EmergencyCall.class);
        //start the second Activity
        this.startActivity(intent);
    } else if (arg0.getId() == R.id.back2) {
            //define a new Intent for the second Activity
            Intent intent = new Intent(this, Destination.class);
            //start the second Activity
            this.startActivity(intent);
        }
    }
}

Answer 1

在Intent

在Destination活动中，在onClick()中写下如下内容：

public void onClick(View view) {
    int id = view.getId();
    // ... 
    if (id == R.id.image1) {
        Intent intent = new Intent(this, DestinationTherapy.class);
        intent.putExtra("res_id", R.drawable.image1);    
        startActivity(intent); 
    } else if ( //... 
}

将R.drawable.image1更改为相应的res ID。在你的情况下，每个图像都会有所不同，所以你需要一种if / switch结构。

在DestinationDetail中获取图像的句柄并将其设置为

setContentView(...); 
ImageView iv = (ImageView) findViewById(R.id.my_detail_image_view);
int resId = getIntent().getIntExtra("res_id", 0);
iv.setImageResource(resId);

您必须使用R.id.my_detail_image_view

中ImageView的相应视图ID更改DestinationDetail

澄清（view id vs res id）：视图ID是您在xml中定义的android:id="@+id/my_view_id"。将图像放入可绘制文件夹时，会自动为您生成图像的res id。您可以在带有R.id.image_name_without_extension的java或带有@drawable/image_name_without_extension

的xml中使用它

如何在嵌套活动中设置图像按钮？

1 个答案: