Android轻便易用的文件选择器ExFilePicker
在新版的Android中(如Android 7.0+),文件选择由于权限限制,Uri变化,文件资源路径格式改版等等,变得比较复杂起来,比如,得在Androidmanifest配置FileProvider完了还得写xml目录下的文件path这些等等。一些第三方的文件选择器,就算没有上面这些动作,一般也得在Androidmanifest写几个Activity。而ExFilePicker则无需上面的繁琐操作,一不需要在Androidmanifest里面定义FileProvider,二不需要写xml文件目录,三不需要在Androidmanifest定义任何Activity,直接在上层Java代码写逻辑,实现文件选择。
ExFilePicker在github上的项目地址:https://github.com/bartwell/ExFilePicker
首先需要在build.gradle添加引用:
compile 'ru.bartwell:exfilepicker:2.1'
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给出一个简单的代码例子:
package zhangfei.file;
import android.content.Intent;
import android.net.Uri;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Toast;
import java.io.File;
import java.util.List;
import ru.bartwell.exfilepicker.ExFilePicker;
import ru.bartwell.exfilepicker.data.ExFilePickerResult;
public class MainActivity extends AppCompatActivity {
private AppCompatActivity mActivity;
private final int EX_FILE_PICKER_RESULT = 0xfa01;
private String startDirectory = null;// 记忆上一次访问的文件目录路径
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mActivity = this;
setContentView(R.layout.activity_main);
findViewById(R.id.choose).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
ExFilePicker exFilePicker = new ExFilePicker();
exFilePicker.setCanChooseOnlyOneItem(true);// 单选
exFilePicker.setQuitButtonEnabled(true);
if (TextUtils.isEmpty(startDirectory)) {
exFilePicker.setStartDirectory(Environment.getExternalStorageDirectory().getPath());
} else {
exFilePicker.setStartDirectory(startDirectory);
}
exFilePicker.setChoiceType(ExFilePicker.ChoiceType.FILES);
exFilePicker.start(mActivity, EX_FILE_PICKER_RESULT);
}
});
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == EX_FILE_PICKER_RESULT) {
ExFilePickerResult result = ExFilePickerResult.getFromIntent(data);
if (result != null && result.getCount() > 0) {
String path = result.getPath();
List<String> names = result.getNames();
for (int i = 0; i < names.size(); i++) {
File f = new File(path, names.get(i));
try {
Uri uri = Uri.fromFile(f); //这里获取了真实可用的文件资源
Toast.makeText(mActivity, "选择文件:" + uri.getPath(), Toast.LENGTH_SHORT)
.show();
startDirectory = path;
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
}
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