ファイル操作ができません

java言語Android関連の質問です
ファイル操作ができません
下のコードでファイル操作ができているはずなのですがロードしたときデータが表示されません

package jp.webcrow.momijinc.cinemasrank;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.EditText;
import android.widget.RatingBar;

import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;

public class add_select extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add_select);
        findViewById(R.id.button4).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                EditText edf = (EditText) findViewById(R.id.editText2);
                RatingBar rbi = (RatingBar) findViewById(R.id.ratingBar);
                OutputStream fos;

                String tvfos = String.valueOf(edf.getText());
                String rb = String.valueOf(rbi.getRating());
                try {
                    fos = openFileOutput("data.txt", Context.MODE_APPEND)
                    PrintWriter writer;
                    writer = new PrintWriter(new OutputStreamWriter(fos,"UTF-8"));
                    writer.append("映画名:" + tvfos + "\n");
                    writer.append("評価:"+rb+"つ\n");
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                startActivity(new Intent(add_select.this, Start_main_scr.class));
            }
        });
    }
}

package jp.webcrow.momijinc.cinemasrank;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class Start_main_scr extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_start_main_scr);
        //----------//
        File file = new File("data.txt");
        if (!file.exists()) {
            FileOutputStream fos = null;
            try {
                fos = openFileOutput("data.txt", Context.MODE_PRIVATE);
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    if (fos != null)
                        fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        try {
            String text;
            text = null;
            FileInputStream input;
            input = openFileInput("test.txt");
            String line;
            while ((line = String.valueOf(input.read())) != null) {
                text += line + "\n";
            }
            // ストリームを閉じる
            TextView tv = (TextView) findViewById(R.id.textView);
            tv.setText(text);
        } catch (IOException e) {
            e.printStackTrace();
        }
        //onclick操作
        findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(Start_main_scr.this, add_select.class));
            }
        });


    }
}

追記

12-30 21:15:20.495 14800-14800/? W/dalvikvm: VFY: unable to find class referenced in signature (Landroid/view/SearchEvent;)
12-30 21:15:20.495 14800-14800/? W/dalvikvm: VFY: unable to resolve interface method 14515: Landroid/view/Window$Callback;.onSearchRequested (Landroid/view/SearchEvent;)Z
12-30 21:15:20.495 14800-14800/? W/dalvikvm: VFY: unable to resolve interface method 14519: Landroid/view/Window$Callback;.onWindowStartingActionMode (Landroid/view/ActionMode$Callback;I)Landroid/view/ActionMode;
12-30 21:15:20.545 14800-14800/? W/dalvikvm: VFY: unable to resolve virtual method 407: Landroid/content/res/TypedArray;.getChangingConfigurations ()I
12-30 21:15:20.545 14800-14800/? W/dalvikvm: VFY: unable to resolve virtual method 429: Landroid/content/res/TypedArray;.getType (I)I
12-30 21:15:20.565 14800-14800/? W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x41766d58)
12-30 21:15:20.565 14800-14800/? E/AndroidRuntime: FATAL EXCEPTION: main
                                                   Process: jp.webcrow.momijinc.cinemasrank, PID: 14800
                                                   java.lang.RuntimeException: Unable to start activity ComponentInfo{jp.webcrow.momijinc.cinemasrank/jp.webcrow.momijinc.cinemasrank.Start_main_scr}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2292)
                                                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2341)
                                                       at android.app.ActivityThread.access$1000(ActivityThread.java:157)
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1290)
                                                       at android.os.Handler.dispatchMessage(Handler.java:102)
                                                       at android.os.Looper.loop(Looper.java:136)
                                                       at android.app.ActivityThread.main(ActivityThread.java:5232)
                                                       at java.lang.reflect.Method.invokeNative(Native Method)
                                                       at java.lang.reflect.Method.invoke(Method.java:515)
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:805)
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:621)
                                                       at dalvik.system.NativeStart.main(Native Method)
                                                    Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
                                                       at android.support.v7.app.AppCompatDelegateImplV7.createSubDecor(AppCompatDelegateImplV7.java:310)
                                                       at android.support.v7.app.AppCompatDelegateImplV7.ensureSubDecor(AppCompatDelegateImplV7.java:279)
                                                       at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:253)
                                                       at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
                                                       at jp.webcrow.momijinc.cinemasrank.Start_main_scr.onCreate(Start_main_scr.java:20)
                                                       at android.app.Activity.performCreate(Activity.java:5239)
                                                       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2256)
                                                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2341) 
                                                       at android.app.ActivityThread.access$1000(ActivityThread.java:157) 
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1290) 
                                                       at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                       at android.os.Looper.loop(Looper.java:136) 
                                                       at android.app.ActivityThread.main(ActivityThread.java:5232) 
                                                       at java.lang.reflect.Method.invokeNative(Native Method) 
                                                       at java.lang.reflect.Method.invoke(Method.java:515) 
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:805) 
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:621) 
                                                       at dalvik.system.NativeStart.main(Native Method)