我有一个本地托管了多个PDF文件的应用程序。几年前它们都打开得很好，但是现在我想对其进行更新，但是它不再在新的Android版本上打开。
我尝试了一些在这里找到的答案，但它不起作用。
打开文件的步骤如下：
public void abrirLey(String nombreLey) {
File fileBrochure = new File(Environment.getExternalStorageDirectory()
.getAbsolutePath() + "/" + nombreLey);
if (!fileBrochure.exists()) {
CopyAssetsbrochure(nombreLey);
}
/** PDF reader code */
File file = new File(Environment.getExternalStorageDirectory()
.getAbsolutePath() + "/" + nombreLey);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file), "application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
try {
getApplicationContext().startActivity(intent);
} catch (ActivityNotFoundException e) {
Toast.makeText(Leyes.this,
"Debe tener instalado un lector de archivos PDF.",
Toast.LENGTH_LONG).show();
}
}
这也是将文件从Assets文件夹复制到手机存储的方法：
public void CopyAssetsbrochure(String nombreLey) {
AssetManager assetManager = getResources().getAssets();
String[] files = null;
try {
files = assetManager.list("leyes/leyesPDF");
} catch (IOException e) {
Log.e("tag", e.getMessage());
}
for (int i = 0; i < files.length; i++) {
String fStr = files[i];
if (fStr.equalsIgnoreCase(nombreLey)) {
InputStream in = null;
OutputStream out = null;
try {
in = assetManager.open("leyes/leyesPDF/" + nombreLey);
out = new FileOutputStream(Environment
.getExternalStorageDirectory().getAbsolutePath()
+ "/" + nombreLey);
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
break;
} catch (Exception e) {
Log.e("tag", e.getMessage());
}
}
}
}
public void copyFile(InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
}
每当我单击按钮打开PDF文件时，应用程序就会停止工作并保持关闭状态。请记住，几年前，同样的代码在我的应用程序中也可以使用。
任何帮助将不胜感激。 谢谢。
--- 编辑：这是我的日志。
2019-08-07 15:24:27.153 30994-30994/com.otbal.abogadom E/tag: /storage/emulated/0/LeyNo17_19.pdf (Permission denied)
2019-08-07 15:24:27.154 30994-30994/com.otbal.abogadom D/AndroidRuntime: Shutting down VM
2019-08-07 15:24:27.155 30994-30994/com.otbal.abogadom E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.otbal.abogadom, PID: 30994
android.os.FileUriExposedException: file:///storage/emulated/0/LeyNo17_19.pdf exposed beyond app through Intent.getData()
at android.os.StrictMode.onFileUriExposed(StrictMode.java:1978)
at android.net.Uri.checkFileUriExposed(Uri.java:2371)
at android.content.Intent.prepareToLeaveProcess(Intent.java:10936)
at android.content.Intent.prepareToLeaveProcess(Intent.java:10887)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1667)
at android.app.ContextImpl.startActivity(ContextImpl.java:979)
at android.app.ContextImpl.startActivity(ContextImpl.java:950)
at android.content.ContextWrapper.startActivity(ContextWrapper.java:384)
at com.otbal.abogadom.Leyes.abrirLey(Leyes.java:632)
at com.otbal.abogadom.Leyes$54.onClick(Leyes.java:515)
at android.view.View.performClick(View.java:7352)
at android.widget.TextView.performClick(TextView.java:14177)
at android.view.View.performClickInternal(View.java:7318)
at android.view.View.access$3200(View.java:846)
at android.view.View$PerformClick.run(View.java:27800)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7037)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)
2019-08-07 15:24:31.160 30994-30994/com.otbal.abogadom W/GAv4: syncDispatchLocalHits timed out: java.util.concurrent.TimeoutException
2019-08-07 15:24:31.164 30994-30994/com.otbal.abogadom E/UncaughtException: android.os.FileUriExposedException: file:///storage/emulated/0/LeyNo17_19.pdf exposed beyond app through Intent.getData()
at android.os.StrictMode.onFileUriExposed(StrictMode.java:1978)
at android.net.Uri.checkFileUriExposed(Uri.java:2371)
at android.content.Intent.prepareToLeaveProcess(Intent.java:10936)
at android.content.Intent.prepareToLeaveProcess(Intent.java:10887)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1667)
at android.app.ContextImpl.startActivity(ContextImpl.java:979)
at android.app.ContextImpl.startActivity(ContextImpl.java:950)
at android.content.ContextWrapper.startActivity(ContextWrapper.java:384)
at com.otbal.abogadom.Leyes.abrirLey(Leyes.java:632)
at com.otbal.abogadom.Leyes$54.onClick(Leyes.java:515)
at android.view.View.performClick(View.java:7352)
at android.widget.TextView.performClick(TextView.java:14177)
at android.view.View.performClickInternal(View.java:7318)
at android.view.View.access$3200(View.java:846)
at android.view.View$PerformClick.run(View.java:27800)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7037)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)