从文件共享和接收简单数据

Question

Using this help 我想恢复文件中的文本，我长按文件，我可以选择要使用的应用程序，所以我选择了我意识到的那个，应用程序考虑了我的操作，但我无法从中恢复文本文件。变量“sharedText”为空。这是下面的代码。

public class MainActivity extends AppCompatActivity {

private static final String TAG = MainActivity.class.getSimpleName();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    TextView textHello = findViewById(R.id.hello);

    Intent intent = getIntent();
    String action = intent.getAction();
    String type   = intent.getType();

    Log.d(TAG," action = "+action); // = android.intent.action.SEND
    Log.d(TAG," type =  "+type);    // = text/plain

    if (Intent.ACTION_SEND.equals(action) && type != null) {
        if ("text/plain".equals(type)) {

            String sharedText = intent.getStringExtra(Intent.EXTRA_TEXT);

            Log.d(TAG, " sharedText =  " + sharedText); // = null

            if (sharedText != null) {

               textHello.setText(sharedText);

            } else {
                sharedText = "it doesn't work for me";
                textHello.setText(sharedText);

            }
        }
    }
}

}

这是宣言

<?xml version="1.0" encoding="utf-8"?>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
            <action android:name="android.intent.action.SEND" />
            <category android:name="android.intent.category.DEFAULT" />
            <data android:mimeType="text/plain" />
        </intent-filter>
    </activity>
</application>

感谢您的回答。

Answer 1

尤里卡，在这里冲浪很多是我的问题的解决方案，我希望它能帮助其他人，我在这里看到了很多类似的问题是帮助我的 link

这是代码

    @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    textHello = findViewById(R.id.hello);

    Intent intent = getIntent();
    String action = intent.getAction();
    String type = intent.getType();

    Log.d(TAG, " action = " + action); // = android.intent.action.SEND
    Log.d(TAG, " type =  " + type);    // = text/plain

    if (Intent.ACTION_SEND.equals(action) && type != null) {
        if ("text/plain".equals(type)) {




            Uri uri = intent.getParcelableExtra(Intent.EXTRA_STREAM);

            Log.d(TAG, " uri =  " + uri);

            StringBuilder text = new StringBuilder();
            try {
                InputStream inputStream = getContentResolver().openInputStream(uri);
                BufferedReader r = new BufferedReader(new InputStreamReader(inputStream));
                String mLine;
                while ((mLine = r.readLine()) != null) {

                    Log.d(TAG, " text =  " + mLine);

                    text.append(mLine);
                    text.append('\n');
                }
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }

            textHello.setText(text);




        }
     }
}

从文件共享和接收简单数据

Share and receive simple data from a file

android

android-sharing