相关疑难解决方法(0)

由于我发现了一些较旧的帖子,告诉whatsapp不支持这个,我想知道是否有什么改变了,是否有办法打开一个whatsapp'聊天'与我通过意图发送的号码？

我按照这个链接,这是我的代码

Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse("content://com.android.contacts/data/" + "MYNUMBER@s.whatsapp.net"));
                i.setPackage("com.whatsapp");
                startActivity(i);

这是我的日志

android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=content://com.android.contacts/data/MYNUMBER@s.whatsapp.net pkg=com.whatsapp }
        at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1545)
        at android.app.Instrumentation.execStartActivity(Instrumentation.java:1416)
        at android.app.Activity.startActivityForResult(Activity.java:3351)
        at android.app.Activity.startActivityForResult(Activity.java:3312)
        at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:824)
        at android.app.Activity.startActivity(Activity.java:3522)
        at android.app.Activity.startActivity(Activity.java:3490)
        at com.sieryuu.maidchan.MainActivity.onClick(MainActivity.java:61)
        at android.view.View.performClick(View.java:4147)
        at android.view.View$PerformClick.run(View.java:17161)
        at android.os.Handler.handleCallback(Handler.java:615)
        at android.os.Handler.dispatchMessage(Handler.java:92)
        at android.os.Looper.loop(Looper.java:213)
        at android.app.ActivityThread.main(ActivityThread.java:4787)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)

我的问题: 如何在后台发送文本到whatsapp联系人(没有选择联系号码,我已经知道ID)？Root如果需要的话

使用此代码只打开特殊号码的聊天但文本不是共享.我该怎么做？

public class MainActivity extends AppCompatActivity {
Button Wa;
String id = "+919000000000";
EditText txt;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    txt = (EditText)findViewById(R.id.editText);
    Wa = (Button)findViewById(R.id.btn_whatsapp);
    Wa.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Uri uri = Uri.parse("smsto:" + id);
            Intent waIntent = new Intent(Intent.ACTION_SENDTO,uri);

            String text = "testing message";
            waIntent.setPackage("com.whatsapp");
            if (waIntent != null) {
                waIntent.putExtra(Intent.EXTRA_TEXT, text);
                startActivity(Intent.createChooser(waIntent, text));
            } else {
                Toast.makeText(getApplicationContext(), "WhatsApp not found", Toast.LENGTH_SHORT)
                        .show();
            }

         }
    });

}