我想从我的图库中选择一张图片，并在ImageView中显示。 但图片没有显示。为什么？ 这是生命周期的问题？或者如何使用setImageBitmap（）是错误的？ 我该怎么办？ 请帮帮我。
- 这是全班 -
public class RegisterView extends Activity {
TextView textCategory;
ImageView imageButton;
EditText productName,price;
private final static int CATEGORY=0;
private final static int GALLERY=1;
private final static int CAMERA=2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.register_view);
textCategory=(TextView)findViewById(R.id.text_category);
imageButton=(ImageView)findViewById(R.id.select_image);
productName=(EditText)findViewById(R.id.product_name);
price=(EditText)findViewById(R.id.price);
Button categoryButton=(Button)findViewById(R.id.category_button);
categoryButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent=new Intent(RegisterView.this,CategoryList.class);
startActivityForResult(intent,CATEGORY);
}
});
ImageView selectImage=(ImageView)findViewById(R.id.select_image);
selectImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
DialogFragment dialog=new SelectImageDialog();
dialog.show(getFragmentManager(),"dialog");
}
});
Button saveButton=(Button)findViewById(R.id.save_button);
saveButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(textCategory.getText().toString().equals("") || imageButton.getDrawable()==null || productName.getText().toString().equals("") || price.getText().toString().equals("")) {
Bundle bundle=new Bundle();
bundle.putString("message","全ての項目を入力してください");
DialogFragment dialog=new CategoryList.AttensionDialog();
dialog.setArguments(bundle);
dialog.show(getFragmentManager(),"dialog");
}else{
DialogFragment dialog = new SaveTimeDialog();
dialog.show(getFragmentManager(), "dialog");
}
}
});
}
public static class SelectImageDialog extends DialogFragment{
@Override
public Dialog onCreateDialog(Bundle savedInstanceState){
AlertDialog.Builder builder=new AlertDialog.Builder(getActivity());
builder.setMessage("画像の設定方法を選択してください").setPositiveButton("カメラ",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Intent intent=new Intent();
intent.setAction("android.media.action.IMAGE_CAPTURE");
startActivityForResult(intent,CAMERA);
}
}).setNegativeButton("ギャラリー",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Intent intent=new Intent();
intent.setAction(intent.ACTION_GET_CONTENT);
intent.setType("image/*");
startActivityForResult(intent,GALLERY);
}
});
return builder.create();
}
}
public static class SaveTimeDialog extends DialogFragment{
@Override
public Dialog onCreateDialog(Bundle savedInstanceState){
AlertDialog.Builder builder=new AlertDialog.Builder(getActivity());
builder.setMessage("データを登録しますか？").setPositiveButton("はい",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
//入力されたデータをデータベースに登録する
}
}).setNegativeButton("いいえ",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
return builder.create();
}
}
@Override
public void onActivityResult(int requestCode,int resultCode,Intent data){
if(requestCode==CATEGORY){
if(resultCode==RESULT_OK) {
Bundle bundle = data.getExtras();
textCategory.setText(bundle.getString("item"));
}
}else if(requestCode==GALLERY){
if(resultCode==RESULT_OK){
try{
InputStream is=getContentResolver().openInputStream(data.getData());
Bitmap bitmap=BitmapFactory.decodeStream(is);
is.close();
imageButton.setImageBitmap(bitmap);
}catch (Exception e){
e.printStackTrace();
}
}
}else if(requestCode==CAMERA){
if(resultCode==RESULT_OK){
Bitmap bitmap=(Bitmap)data.getExtras().get("data");
imageButton.setImageBitmap(savePic(bitmap));
}
}
}
public Bitmap savePic(Bitmap bitmap){
String path= Environment.getExternalStorageDirectory().getPath();
try {
FileOutputStream outputStream = new FileOutputStream(path+"pic.png");
bitmap.compress(Bitmap.CompressFormat.PNG,100,outputStream);
outputStream.close();
}catch (Exception e){
e.printStackTrace();
}
String[] paths = {Environment.getExternalStorageDirectory().getPath()+"/pic.png"};
String[] mimeType = {"image/png"};
MediaScannerConnection.scanFile(getApplicationContext(), paths, mimeType, new MediaScannerConnection.OnScanCompletedListener() {
@Override
public void onScanCompleted(String s, Uri uri) {
}
});
return bitmap;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.my, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
这是logcat的消息。
11-14 15:31:23.126 18201-18201/com.example.appdev.shop D/libEGL﹕ loaded /system/lib/egl/libEGL_adreno200.so
11-14 15:31:23.126 18201-18201/com.example.appdev.shop D/libEGL﹕ loaded /system/lib/egl/libGLESv1_CM_adreno200.so
11-14 15:31:23.126 18201-18201/com.example.appdev.shop D/libEGL﹕ loaded /system/lib/egl/libGLESv2_adreno200.so
11-14 15:31:23.126 18201-18201/com.example.appdev.shop I/Adreno200-EGL﹕ <qeglDrvAPI_eglInitialize:265>: EGL 1.4 QUALCOMM build: AU_LINUX_ANDROID_JB_2.5.6.04.02.02.093.081_msm8960_JB_2.5.6_CL3544079_release_AU (CL3544079)
Build Date: 06/27/13 Thu
Local Branch:
Remote Branch: m/jb_2.5.6
Local Patches: NONE
Reconstruct Branch: AU_LINUX_ANDROID_JB_2.5.6.04.02.02.093.081 + NOTHING
11-14 15:31:23.156 18201-18201/com.example.appdev.shop D/OpenGLRenderer﹕ Enabling debug mode 0
11-14 15:31:27.301 18201-18201/com.example.appdev.shop W/IInputConnectionWrapper﹕ showStatusIcon on inactive InputConnection
答案 0 :(得分：0)
关于KITKAT的问题。你需要做这个工作。
public static final String KITKAT_VALUE = 1002;
Intent intent;
if (Build.VERSION.SDK_INT < 19){
intent = new Intent();
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.setType("*/*");
startActivityForResult(intent, KITKAT_VALUE);
}
else
{
intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("*/*");
startActivityForResult(intent, KITKAT_VALUE);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == Activity.RESULT_OK && data!=null) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
imageButton.setImageBitmap(BitmapFactory.decodeFile(picturePath));
}
}
参考：Android Gallery on KitKat returns different Uri for Intent.ACTION_GET_CONTENT