我試圖從本地存儲中的文件路徑加載圖像到imageView。Android將圖像從路徑加載到圖像查看
private final String PATH = "file:///storage/emulated/0/Downloads/image.png"
正如論壇的其他地方建議我試着用腳墊加載它既:
Glide.with(this)
.load(PATH)
.into(imageView);
和位圖/ BitmapFactory:
ImageView imageView = (ImageView) findViewById(R.id.imageView);
File f = new File(PATH);
if(f.exists()){
Bitmap myBitmap = BitmapFactory.decodeFile(f.getAbsolutePath());
imageView.setImageBitmap(myBitmap);
,但我總是得到佔位符圖像。
在清單中,我添加了權限WRITE.EXTERNAL.STORAGE和READ.EXTERNAL.STORAGE。
試圖調試它似乎加載f變量中的正確路徑。
感謝您的幫助
編輯:我已經嘗試了所有建議的解決方案,但我仍然剛開黑屏......
我也只是爲了更好地測試做一個ImageView的一個全新的應用程序:
package com.example.android.pic;
import android.Manifest;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Environment;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ImageView;
import com.bumptech.glide.Glide;
import java.io.File;
public class MainActivity extends AppCompatActivity {
Uri PATH = Uri.fromFile(new File((Environment.getExternalStorageDirectory().getPath() + "/Pictures/agata.png")));
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
int permissionCheck = ContextCompat.checkSelfPermission(this,
Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
} else {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
}
}
ImageView imageView = (ImageView) findViewById(R.id.pic);
Glide.with(this)
.load(PATH)
.into(imageView);
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode) {
case 1: {
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
ImageView imageView = (ImageView) findViewById(R.id.pic);
Glide.with(this)
.load(PATH)
.into(imageView);
} else {
finish();
}
}
default:
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
}
請大家幫忙! 謝謝
是否轉換爲開放的作品? 'Uri.parse(PATH)' –
你在android 6+上測試應用程序嗎? –
[顯示圖像視圖從文件路徑?](https://stackoverflow.com/questions/4181774/show-image-view-from-file-path) –