我正在尝试从本地存储的文件路径中加载图像到一个imageView。
private final String PATH = "file:///storage/emulated/0/Downloads/image.png"
如论坛中其他地方所建议的,我尝试使用Glide加载它:
Glide.with(this)
.load(PATH)
.into(imageView);
与位图/位图工厂相关:
ImageView imageView = (ImageView) findViewById(R.id.imageView);
File f = new File(PATH);
if(f.exists()){
Bitmap myBitmap = BitmapFactory.decodeFile(f.getAbsolutePath());
imageView.setImageBitmap(myBitmap);
但是我总是得到占位符图片。
在清单文件中,我添加了WRITE.EXTERNAL.STORAGE和READ.EXTERNAL.STORAGE权限。
尝试调试时,似乎将正确的路径加载到f变量中。
感谢帮助。
编辑:我已尝试所有建议的解决方案,但仍然得到空白屏幕...
我还创建了一个仅具有一个imageView的全新应用程序进行更好的测试:
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! Thanks
Uri.parse(PATH)
- Edson Menegatti