【Android项目闪退求助】安卓新手，请大神帮忙看看

Keyon同学 2018-04-17 11:32:22
本人大二Android新手，在做课本例题时遇到了用SQLite时闪退的问题，请大佬给予指点

开发软件是Android Studio

代码如下：
public class MainActivity extends AppCompatActivity {



    private String[] columns = { Contacts._ID,							// 获得ID值

            Contacts.DISPLAY_NAME,// 获得姓名

            Phone.NUMBER,// 获得电话

            Phone.CONTACT_ID };



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        TextView tv = (TextView) findViewById(R.id.result);				// 获得布局文件中的文本框

        tv.setText(getQueryData());									// 为文本框设置显示文本



    }

    private String getQueryData() {

        StringBuilder sb = new StringBuilder();							// 用于保存字符串

        ContentResolver resolver = getContentResolver();				// 获得ContentResolver对象

        Cursor cursor = resolver.query(Contacts.CONTENT_URI, null, null, null, null);// 查询记录

        while (cursor.moveToNext()) {

            int idIndex = cursor.getColumnIndex(columns[0]);				// 获得ID值的索引

            int displayNameIndex = cursor.getColumnIndex(columns[1]);	// 获得姓名索引

            int id = cursor.getInt(idIndex);							// 获得id

            String displayName = cursor.getString(displayNameIndex);		// 获得名称

            Cursor phone = resolver.query(Phone.CONTENT_URI, null, columns[3] + "=" + id, null, null);

            while (phone.moveToNext()) {

                int phoneNumberIndex = phone.getColumnIndex(columns[2]);	// 获得电话索引

                String phoneNumber = phone.getString(phoneNumberIndex);	// 获得电话

                sb.append(displayName + ": " + phoneNumber + "\n");		// 保存数据

            }

        }

        cursor.close();// 关闭游标

        return sb.toString();

    }



    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }



    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        // Handle action bar item clicks here. The action bar will

        // automatically handle clicks on the Home/Up button, so long

        // as you specify a parent activity in AndroidManifest.xml.

        int id = item.getItemId();

        if (id == R.id.action_settings) {

            return true;

        }

        return super.onOptionsItemSelected(item);

    }

}


log如下：
E/AndroidRuntime: FATAL EXCEPTION: main

                  Process: com.example.exam8_8, PID: 21766

                  java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.exam8_8/com.example.exam8_8.MainActivity}: java.lang.SecurityException: Permission Denial: opening provider com.android.providers.contacts.ContactsProvider2 from ProcessRecord{f4cc77a 21766:com.example.exam8_8/u0a111} (pid=21766, uid=10111) requires android.permission.READ_CONTACTS or android.permission.WRITE_CONTACTS

                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2892)

                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3027)

                      at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)

                      at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:101)

                      at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:73)

                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1786)

                      at android.os.Handler.dispatchMessage(Handler.java:106)

                      at android.os.Looper.loop(Looper.java:164)

                      at android.app.ActivityThread.main(ActivityThread.java:6656)

                      at java.lang.reflect.Method.invoke(Native Method)

                      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)

                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)

                   Caused by: java.lang.SecurityException: Permission Denial: opening provider com.android.providers.contacts.ContactsProvider2 from ProcessRecord{f4cc77a 21766:com.example.exam8_8/u0a111} (pid=21766, uid=10111) requires android.permission.READ_CONTACTS or android.permission.WRITE_CONTACTS

                      at android.os.Parcel.createException(Parcel.java:1942)

                      at android.os.Parcel.readException(Parcel.java:1865)

                      at android.app.IActivityManager$Stub$Proxy.getContentProvider(IActivityManager.java:4967)

                      at android.app.ActivityThread.acquireProvider(ActivityThread.java:5970)

                      at android.app.ContextImpl$ApplicationContentResolver.acquireUnstableProvider(ContextImpl.java:2545)

                      at android.content.ContentResolver.acquireUnstableProvider(ContentResolver.java:1799)

                      at android.content.ContentResolver.query(ContentResolver.java:757)

                      at android.content.ContentResolver.query(ContentResolver.java:723)

                      at android.content.ContentResolver.query(ContentResolver.java:681)

                      at com.example.exam8_8.MainActivity.getQueryData(MainActivity.java:33)

                      at com.example.exam8_8.MainActivity.onCreate(MainActivity.java:27)

                      at android.app.Activity.performCreate(Activity.java:7117)

                      at android.app.Activity.performCreate(Activity.java:7108)

                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1262)

                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2867)

                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3027) 

                      at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) 

                      at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:101) 

                      at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:73) 

                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1786) 

                      at android.os.Handler.dispatchMessage(Handler.java:106) 

                      at android.os.Looper.loop(Looper.java:164) 

                      at android.app.ActivityThread.main(ActivityThread.java:6656) 

                      at java.lang.reflect.Method.invoke(Native Method) 

                      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) 

                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823) 

                   Caused by: android.os.RemoteException: Remote stack trace:

                      at com.android.server.am.ActivityManagerService.getContentProviderImpl(ActivityManagerService.java:11794)

                      at com.android.server.am.ActivityManagerService.getContentProvider(ActivityManagerService.java:12175)

                      at android.app.IActivityManager$Stub.onTransact(IActivityManager.java:477)

                      at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:3114)

                      at android.os.Binder.execTransact(Binder.java:726)

Application terminated.
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kingiis 2018-04-19
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老夫传你一DBFlow ,从此数据库不用愁。
懒笑翻 2018-04-18
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Caused by: java.lang.SecurityException: Caused by: android.os.RemoteException:
x443137254 2018-04-17
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添加权限：android.permission.READ_CONTACTS or android.permission.WRITE_CONTACTS
键盘舞者113 2018-04-17
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把代码上传，贴出链接
Android小码家 2018-04-17
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引用 4 楼 YK0307 的回复:
[quote=引用 3 楼 qq_20330595 的回复:] Caused by: java.lang.SecurityException: Permission Denial: opening provider com.android.providers.contacts.ContactsProvider2 from ProcessRecord{f4cc77a 21766:com.example.exam8_8/u0a111} (pid=21766, uid=10111) requires android.permission.READ_CONTACTS or android.permission.WRITE_CONTACTS 这个说的是需要获取 读取联系人权限 还有数据库 应该也需要 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
你好，我把这些代码已经加进Menifest里面了，但是log里还是提示同样的权限错误，然后我百度了下结果是因为Android 6.0往后更新了安全机制，需要用户授权，然后找到解决方法，添加如下代码来进行权限校验： 
public class MainActivity extends Activity {
    final private int REQUEST_CODE_ASK_PERMISSIONS = 123;
    int hasWriteContactsPermisson = checkSelfPermission(android.Manifest.permission.READ_CONTACTS);
    if(hasWriteContactsPermisson != PackageManager.PERMISSION_GRANTED)
    {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            requestPermissions(new String[]
                            {Manifest.permission.WRITE_CONTACTS},
                    REQUEST_CODE_ASK_PERMISSIONS);
        }
        return;
    }
    //使用ContentResolver查找联系人数据
    Cursor cursor = getContentResolver().query(
            ContactsContract.Contacts.CONTENT_URI,
            null,null,null,null);
但是这里面的hasWriteContactsPermisson和PackageManager.PERMISSION_GRANTED报错Unknownclass，Alt+Enter也没有提示项，该怎么解决呢[/quote] 是不是这样？ final private int REQUEST_CODE_ASK_PERMISSIONS = 123; @TargetApi(Build.VERSION_CODES.M) private void requeset() { int hasWriteContactsPermisson = checkSelfPermission(android.Manifest.permission.READ_CONTACTS); if (hasWriteContactsPermisson != PackageManager.PERMISSION_GRANTED) { requestPermissions(new String[] {Manifest.permission.WRITE_CONTACTS}, REQUEST_CODE_ASK_PERMISSIONS); } } @TargetApi(Build.VERSION_CODES.M) private void toRequeset() { int hasWriteContactsPermisson = ActivityCompat.checkSelfPermission(this,android.Manifest.permission.READ_CONTACTS); if (hasWriteContactsPermisson != PackageManager.PERMISSION_GRANTED) { requestPermissions(new String[] {Manifest.permission.WRITE_CONTACTS}, REQUEST_CODE_ASK_PERMISSIONS); } }
Android小码家 2018-04-17
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引用 4 楼 YK0307 的回复:
[quote=引用 3 楼 qq_20330595 的回复:] Caused by: java.lang.SecurityException: Permission Denial: opening provider com.android.providers.contacts.ContactsProvider2 from ProcessRecord{f4cc77a 21766:com.example.exam8_8/u0a111} (pid=21766, uid=10111) requires android.permission.READ_CONTACTS or android.permission.WRITE_CONTACTS 这个说的是需要获取 读取联系人权限 还有数据库 应该也需要 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
你好，我把这些代码已经加进Menifest里面了，但是log里还是提示同样的权限错误，然后我百度了下结果是因为Android 6.0往后更新了安全机制，需要用户授权，然后找到解决方法，添加如下代码来进行权限校验： 
public class MainActivity extends Activity {
    final private int REQUEST_CODE_ASK_PERMISSIONS = 123;
    int hasWriteContactsPermisson = checkSelfPermission(android.Manifest.permission.READ_CONTACTS);
    if(hasWriteContactsPermisson != PackageManager.PERMISSION_GRANTED)
    {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            requestPermissions(new String[]
                            {Manifest.permission.WRITE_CONTACTS},
                    REQUEST_CODE_ASK_PERMISSIONS);
        }
        return;
    }
    //使用ContentResolver查找联系人数据
    Cursor cursor = getContentResolver().query(
            ContactsContract.Contacts.CONTENT_URI,
            null,null,null,null);
但是这里面的hasWriteContactsPermisson和PackageManager.PERMISSION_GRANTED报错Unknownclass，Alt+Enter也没有提示项，该怎么解决呢[/quote] 用ActivityCompat这个类。或者前面我写的 private void toRequeset() { int hasWriteContactsPermisson = ActivityCompat.checkSelfPermission(this,android.Manifest.permission.READ_CONTACTS); if (hasWriteContactsPermisson != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(this,new String[] {Manifest.permission.WRITE_CONTACTS}, REQUEST_CODE_ASK_PERMISSIONS); } }
qq_31461209 2018-04-17
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引用 5 楼 qq_31461209 的回复:
String[] permission = new String[]{Manifest.permission.READ_CONTACTS}; if(ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS)!= PackageManager.PERMISSION_GRANTED){ ActivityCompat.requestPermissions(this,permission,1); }
这个是安卓6.0以上动态获取权限的
qq_31461209 2018-04-17
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楼主你试下这样写 应该是没有问题的
qq_31461209 2018-04-17
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String[] permission = new String[]{Manifest.permission.READ_CONTACTS}; if(ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS)!= PackageManager.PERMISSION_GRANTED){ ActivityCompat.requestPermissions(this,permission,1); }
Keyon同学 2018-04-17
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引用 3 楼 qq_20330595 的回复:
Caused by: java.lang.SecurityException: Permission Denial: opening provider com.android.providers.contacts.ContactsProvider2 from ProcessRecord{f4cc77a 21766:com.example.exam8_8/u0a111} (pid=21766, uid=10111) requires android.permission.READ_CONTACTS or android.permission.WRITE_CONTACTS 这个说的是需要获取 读取联系人权限 还有数据库 应该也需要 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
你好，我把这些代码已经加进Menifest里面了，但是log里还是提示同样的权限错误，然后我百度了下结果是因为Android 6.0往后更新了安全机制，需要用户授权，然后找到解决方法，添加如下代码来进行权限校验： 
public class MainActivity extends Activity {
    final private int REQUEST_CODE_ASK_PERMISSIONS = 123;
    int hasWriteContactsPermisson = checkSelfPermission(android.Manifest.permission.READ_CONTACTS);
    if(hasWriteContactsPermisson != PackageManager.PERMISSION_GRANTED)
    {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            requestPermissions(new String[]
                            {Manifest.permission.WRITE_CONTACTS},
                    REQUEST_CODE_ASK_PERMISSIONS);
        }
        return;
    }
    //使用ContentResolver查找联系人数据
    Cursor cursor = getContentResolver().query(
            ContactsContract.Contacts.CONTENT_URI,
            null,null,null,null);
但是这里面的hasWriteContactsPermisson和PackageManager.PERMISSION_GRANTED报错Unknownclass，Alt+Enter也没有提示项，该怎么解决呢
Android小码家 2018-04-17
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Caused by: java.lang.SecurityException: Permission Denial: opening provider com.android.providers.contacts.ContactsProvider2 from ProcessRecord{f4cc77a 21766:com.example.exam8_8/u0a111} (pid=21766, uid=10111) requires android.permission.READ_CONTACTS or android.permission.WRITE_CONTACTS 这个说的是需要获取 读取联系人权限 还有数据库 应该也需要 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
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