[英]Android Load image from path to imageView
I am trying to load image from file path in local storage to an imageView. 我正在尝试将图像从本地存储中的文件路径加载到imageView。
private final String PATH = "file:///storage/emulated/0/Downloads/image.png"
As suggested elsewhere in the forum I've tried to load it both using Glide: 正如论坛中其他地方所建议的那样,我尝试使用Glide加载它们:
Glide.with(this)
.load(PATH)
.into(imageView);
and Bitmap/BitmapFactory: 和Bitmap / 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);
but I always get the placeholder image. 但我总是得到占位符图像。
In the manifest I added the permission WRITE.EXTERNAL.STORAGE and READ.EXTERNAL.STORAGE. 在清单中,我添加了权限WRITE.EXTERNAL.STORAGE和READ.EXTERNAL.STORAGE。
Trying to debug it seems to load the correct path in f variable. 尝试调试似乎在f变量中加载了正确的路径。
Thanks for help 感谢帮助
Edit: I have tried all the suggested solution, but I continue gettin blank screen... 编辑:我已经尝试了所有建议的解决方案,但我继续得到空白屏幕...
I have also made a brand new app with one imageView only to better test: 我还制作了一个带有一个imageView的全新应用,目的只是为了更好地进行测试:
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);
}
}
}
please help! 请帮忙! Thanks
谢谢
Your file path deceleration is wrong. 您的文件路径减速错误。 Try changing PATH to
尝试将PATH更改为
private final StringPATH="/storage/emulated/0/Downloads/image.png"
You Should use this code 您应该使用此代码
final InputStream imageStream = getContentResolver().openInputStream(imageUri);
final Bitmap selectedImage = BitmapFactory.decodeStream(imageStream);
image.setImageBitmap(selectedImage);
in this code you want imageUri that can use StringPATH: 在此代码中,您需要可以使用StringPATH的imageUri:
private final StringPATH="/storage/emulated/0/Downloads/image.png"
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