Question

当我点击图片时没有响应。但是当我在XML中添加onClick（）时会崩溃。我有多张图片可以帮助我。

XML文件

  <ImageView
            android:id="@+id/cto"
            android:layout_width="60dp"
            android:layout_height="60dp"
            android:onClick="onClick"
            android:layout_alignBottom="@+id/fb"
            android:layout_toLeftOf="@+id/fb"
            android:layout_toStartOf="@+id/fb"
            android:src="@drawable/callto" />

Java文件

    public class Content_main extends AppCompatActivity {

    private ImageView call;

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

        call = findViewById(R.id.cto);

        call.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {

                Intent callIntent = new Intent(Intent.ACTION_CALL);
                callIntent.setData(Uri.parse("tel: 9871275493"));
                if (ActivityCompat.checkSelfPermission(Content_main.this,
                        Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
                    return;
                }
                startActivity(callIntent);
            }
        });

    }
}

当我添加onClick值＆amp;时出现错误如果我没有添加它没有回复

03-29 17:24:57.188 4158-4158/com.flavourbasket.flavourbasket E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.flavourbasket.flavourbasket, PID: 4158
    java.lang.IllegalStateException: Could not find method onClick(View) in a parent or ancestor Context for android:onClick attribute defined on view class android.support.v7.widget.AppCompatImageView with id 'cto'
        at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:327)
        at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:284)
        at android.view.View.performClick(View.java:6294)
        at android.view.View$PerformClick.run(View.java:24770)
        at android.os.Handler.handleCallback(Handler.java:790)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6494)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

Answer 1

试试这个你忘了 @Override

  call.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent callIntent = new Intent(Intent.ACTION_CALL);
                callIntent.setData(Uri.parse("tel: 9871275493"));
                if (ActivityCompat.checkSelfPermission(Content_main.this,
                        Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
                    return;
                }
                startActivity(callIntent);
            }
        });

修改

同时从您的android:onClick="onClick"
中删除 ImageView
<ImageView android:id="@+id/cto" android:layout_width="60dp" android:layout_height="60dp" android:layout_alignBottom="@+id/fb" android:layout_toLeftOf="@+id/fb" android:layout_toStartOf="@+id/fb" android:src="@drawable/callto" />

Answer 2

从xml中删除此行以解决崩溃

 android:onClick="onClick"

接下来请记住，使用requestPermission方法（示例）

请求运行时权限

ActivityCompat.requestPermissions(thisActivity,
                new String[]{Manifest.permission.CALL_PHONE},
                MY_PERMISSIONS_REQUEST_CALL_PHONE);

Answer 3

您是从xml添加onclick方法，还是使用

设置侦听器

setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {}
        }

Answer 4

我认为这可能是演员阵容。你没有投射imageview。尝试施展它

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4 个答案: