如果在2个微调中选择了两个项目，则图像必须以可绘制形式显示

Question

此处添加2个微调器。如果我选择特定的item1和item2，则必须显示特定的图像。例如，如果选择“Gujarat”和“Gandhinagr”，则必须显示图像abc.png。 Plz帮助我。

public class MainActivity extends Activity implements OnItemSelectedListener { 

private String[] INDIAN_STATE = { "Gujarat", "Andra Pradesh", 
     "Arunachal Pradesh", "Assam", "Bihar", "Chhattisgarh", "Goa", 
     "Haryana", "Himachal Pradesh", "Jammu and Kashmir", "Jharkhand", 
     "Karnataka", "Kerala", "Madya Pradesh", "Maharashtra", "Manipur", 
     "Meghalaya", "Mizoram", "Nagaland", "Orissa", "Punjab", 
     "Rajasthan", "Sikkim", "Tamil Nadu", "Tripura", "Uttaranchal", 
     "Uttar Pradesh", "West Bengal" }; 

private String[] INDIAN_STATE_CAPITAL = { "Gandhinagar", "Hyderabad", 
     "Itangar", "Dispur", "Patna", "Raipur", "Panaji", "Chandigarh", 
     "Shimla", "Srinagar and Jammu", "Ranchi", "Bangalore", 
     "Thiruvananthapuram", "Bhopal", "Mumbai", "Imphal", "Shillong", 
     "Aizawi", "Kohima", "Bhubaneshwar", "Chandigarh", "Jaipur", 
     "Gangtok", "Chennai", "Agartala", "Dehradun", "Lucknow", "Kolkata"  }; 

Spinner spinnerState, spinnerCapital; 
TextView tvState, tvCapital; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    System.out.println(INDIAN_STATE.length); 
    System.out.println(INDIAN_STATE_CAPITAL.length); 

    tvState = (TextView) findViewById(R.id.mystate); 
    tvCapital = (TextView) findViewById(R.id.mystatescapital); 

    spinnerState = (Spinner) findViewById(R.id.spinnerstate); 
    spinnerCapital = (Spinner) findViewById(R.id.spinnercapital); 

    ArrayAdapter<String> adapter_state = new ArrayAdapter<String>(this, 
      android.R.layout.simple_spinner_item, INDIAN_STATE); 
    adapter_state 
      .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    spinnerState.setAdapter(adapter_state); 

    ArrayAdapter<String> adapter_state_capital = new ArrayAdapter<String>(
      this, android.R.layout.simple_spinner_item, 
      INDIAN_STATE_CAPITAL); 
    adapter_state_capital 
      .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    spinnerCapital.setAdapter(adapter_state_capital); 

    spinnerState.setOnItemSelectedListener(this); 
    spinnerCapital.setOnItemSelectedListener(this); 
} 

public void onItemSelected(AdapterView<?> parent, View view, int position, 
     long id) { 

    spinnerState.setSelection(position); 
    spinnerCapital.setSelection(position); 

    String myState = (String) spinnerState.getSelectedItem(); 
    String myStatesCapital = (String) spinnerCapital.getSelectedItem(); 

    tvState.setText("My State is " + myState); 
    tvCapital.setText("My State is " + myState + ".And its Capital is " 
      + myStatesCapital); 

} 

public void onNothingSelected(AdapterView<?> parent) { 

} 

}

Answer 1

看看文档： http://developer.android.com/guide/topics/ui/controls/spinner.html

我要去假设，可以有每个州首府多 - 否则，你不需要资本微调在所有。

首先，按照上述微调文档，摆脱

spinnerState.setSelection(position); 
spinnerCapital.setSelection(position); 

String myState = (String) spinnerState.getSelectedItem(); 
String myStatesCapital = (String) spinnerCapital.getSelectedItem(); 

，只是使用

parent.getItemAtPosition(pos) 

然后，添加调用您要使用显示方法照片。这里有一些伪代码

private Drawable getSelectedImage(String state, String capital){ 

    // Compare your selections here 
    if(state.equals("Foo"){ 
     if(capital.equals("Bar"){ 
       //get and set appropriate image here 
       int imageResource = R.drawable.foo_bar; 
       return getResources().getDrawable(imageResource); 
     } 
    } 
} 

确保您的图像文件被添加到适当的可绘制文件夹。