Android 活动创建时未设置ImageView和TextView
我试图在我的活动中显示一个图像和一些字符串,但由于某些原因,视图没有被修改 这是我的代码:Android 活动创建时未设置ImageView和TextView,android,android-activity,Android,Android Activity,我试图在我的活动中显示一个图像和一些字符串,但由于某些原因,视图没有被修改 这是我的代码: import java.io.File; import java.io.FileInputStream; import android.os.Bundle; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.view.Menu
import java.io.File;
import java.io.FileInputStream;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.Menu;
import android.widget.ImageView;
import android.widget.TextView;
public class ObjectProperty extends Activity {
Activity myAct = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
myAct = this;
setContentView(R.layout.object_property);
String objetoNome = myAct.getIntent().getStringExtra("nome");
String arquivo = myAct.getIntent().getStringExtra("arquivo");
String descricao = myAct.getIntent().getStringExtra("descricaoCompleta");
System.out.println("objeto nome: " + objetoNome); //not null/empty
System.out.println("arquivo: " + arquivo); //not null/empty
System.out.println("descricao: " + descricao); //not null/empty
ImageView imageView = (ImageView)findViewById(R.id.item_image);
TextView textViewNome = (TextView)findViewById(R.id.item_nome);
TextView textViewDescricao = (TextView)findViewById(R.id.item_desc);
textViewNome.setText(objetoNome); //does not set text
textViewDescricao.setText(descricao); //does not set text
if(!arquivo.equals("")){
Bitmap myBit = getThumbnail(arquivo);
if(myBit != null)
imageView.setImageBitmap(myBit); // does not set image
}
super.onCreate(savedInstanceState);
setContentView(R.layout.object_property);
}
public Bitmap getThumbnail(String filename)
{
Bitmap thumbnail = null;
try {
File filePath = myAct.getFileStreamPath(filename);
FileInputStream fi = new FileInputStream(filePath);
thumbnail = BitmapFactory.decodeStream(fi);
} catch (Exception ex) {
ex.printStackTrace();
}
return thumbnail;
}
}
我做错了什么?删除此项
setContentView(R.layout.object_property);
从onCreate的最后一部分中删除此
setContentView(R.layout.object_property);
从onCreate.的最后一部分调用超类方法
super.onCreate(savedInstanceState)
必须位于oncreate()方法的第一行
删除最后一行
setContentView(R.layout.object\u属性)。调用超类方法super.oncreate(savedInstanceState)
必须位于oncreate()方法的第一行
删除最后一行setContentView(R.layout.object\u属性)代码>在oncreate()方法中。试试这个,只调用setContenView一次
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//your code
}
尝试此操作,只需调用SetContenView一次
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//your code
}
给出一个已经给出的答案有什么意义\给出一个已经给出的答案有什么意义\