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我的應用程序是當用戶點擊底部。它將顯示在像冊的圖像或另一個應用程序，並當用戶選擇圖像從庫然後顯示選擇的圖像形式的用戶錯誤顯示圖像形式SDcard
我找到ImagePath與方法FindPath()
"String imagePath = findPath(imageUri);"
return type String .
然後我顯示與
"Bitmap imageData = BitmapFactory.decodeFile(imagePath);
image.setImageBitmap(imageData);"
這是我的runtimeError ithink它是關於顯示圖像的錯誤
08-27 04:42:24.815: E/AndroidRuntime(1789): FATAL EXCEPTION: main
08-27 04:42:24.815: E/AndroidRuntime(1789): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { dat=content://media/external/images/media/13 }} to activity {com.example.gallerymagazine/com.example.gallerymagazine.MainActivity}: java.lang.NullPointerException
08-27 04:42:24.815: E/AndroidRuntime(1789): at android.app.ActivityThread.deliverResults(ActivityThread.java:3319)
08-27 04:42:24.815: E/AndroidRuntime(1789): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3362)
08-27 04:42:24.815: E/AndroidRuntime(1789): at android.app.ActivityThread.access$1100(ActivityThread.java:141)
08-27 04:42:24.815: E/AndroidRuntime(1789): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1282)
08-27 04:42:24.815: E/AndroidRuntime(1789): at android.os.Handler.dispatchMessage(Handler.java:99)
08-27 04:42:24.815: E/AndroidRuntime(1789): at android.os.Looper.loop(Looper.java:137)
08-27 04:42:24.815: E/AndroidRuntime(1789): at android.app.ActivityThread.main(ActivityThread.java:5041)
08-27 04:42:24.815: E/AndroidRuntime(1789): at java.lang.reflect.Method.invokeNative(Native Method)
08-27 04:42:24.815: E/AndroidRuntime(1789): at java.lang.reflect.Method.invoke(Method.java:511)
08-27 04:42:24.815: E/AndroidRuntime(1789): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
08-27 04:42:24.815: E/AndroidRuntime(1789): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
08-27 04:42:24.815: E/AndroidRuntime(1789): at dalvik.system.NativeStart.main(Native Method)
08-27 04:42:24.815: E/AndroidRuntime(1789): Caused by: java.lang.NullPointerException
08-27 04:42:24.815: E/AndroidRuntime(1789): at com.example.gallerymagazine.MainActivity.onActivityResult(MainActivity.java:62)
08-27 04:42:24.815: E/AndroidRuntime(1789): at android.app.Activity.dispatchActivityResult(Activity.java:5293)
08-27 04:42:24.815: E/AndroidRuntime(1789): at android.app.ActivityThread.deliverResults(ActivityThread.java:3315)
08-27 04:42:24.815: E/AndroidRuntime(1789): ... 11 more
這是我的代碼
package com.example.gallerymagazine;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends Activity {
private static final int browse_image = 1;
private TextView text;
private Button browse;
private ImageView image;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView text = (TextView) findViewById(R.id.text);
ImageView image = (ImageView) findViewById(R.id.image);
Button browse = (Button) findViewById(R.id.browse_image_button);
browse.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent();
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
startActivityForResult(Intent.createChooser(intent, "select app to pick image"),browse_image);
}
});
}
protected void onActivityResult(int requestCode, int resultCode, Intent returnedIntent){
super.onActivityResult(requestCode, resultCode, returnedIntent);
switch (requestCode){
case browse_image:
if(resultCode != RESULT_CANCELED){
if(resultCode == RESULT_OK){
// เมือคลิกที่รูป ข้อมูลจะถูกส่งผ่านพารามิเตอร์ returnedIntent โดยมีผลลัพธ์เป็น URI(ฝช้ในการหาไฟล์พาด)
Uri imageUri = returnedIntent.getData();
String msg = "URL::"+imageUri+"\n";
// นำURI หาpath
String imagePath = findPath(imageUri);
msg += "Path::"+imagePath;
Log.i("Path",imagePath);
// นำpath ไปดึงรูปมาแสดง
Bitmap imageData = BitmapFactory.decodeFile(imagePath);
image.setImageBitmap(imageData);
}
}else{
Log.e("ERROR","error happened");
}
}
}
// method find path
private String findPath(Uri imageUri) {
// TODO Auto-generated method stub
String imagePath;
String[] columns = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(imageUri, columns, null, null, null);
//จาก Gallery
if(cursor != null){
int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
imagePath = cursor.getString(columnIndex);
//อื่นๆ
}else{
imagePath = imageUri.getPath();
}
return imagePath;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
這是我的佈局顯示
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<Button
android:id="@+id/browse_image_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Browse Image"/>
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/browse_image_button"
android:layout_centerHorizontal="true"
android:layout_marginTop="44dp"
android:text="TextView" />
<ImageView
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:src="@drawable/ic_launcher" />
</RelativeLayout>
請檢查它，謝謝你每天多
請發表您的代碼 – nedaRM
我的代碼被編輯 –